[ADF-4152] Updated folder structure of core docs (#4415)

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Moved core library docs into subfolders

* [ADF-4152] Manual fixes to core doc file links

* [ADF-4152] Further automatic + manual link tidying

docs/core/pipes/app-config.pipe.md

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+---
+Title: App Config Pipe
+Added: v2.4.0
+Status: Active
+Last reviewed: 2018-05-24
+---
+
+# [App Config Pipe](../../../lib/core/app-config/app-config.pipe.ts "Defined in app-config.pipe.ts")
+
+Retrieves values from the application configuration file directly.
+
+## Basic usage
+
+```html
+<adf-login
+    copyrightText="{{ 'application.copyright' | adfAppConfig }}">
+</adf-login>
+```
+
+## Details
+
+### Fallback values
+
+You can use the pipe parameter to pass a fallback value which will be
+used if the property name is not found:
+
+```html
+<adf-login
+    copyrightText="{{ 'application.copyright' | adfAppConfig:'Fallback Text' }}">
+</adf-login>
+```
+
+### Chaining with other pipes
+
+You can also chain values with other pipes such as the translation pipe:
+
+```html
+<adf-login
+    copyrightText="{{ 'application.copyright' | adfAppConfig | translate }}">
+</adf-login>
+```
+
+## See also
+
+-   [App Config service](../services/app-config.service.md)

docs/core/pipes/file-size.pipe.md

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+---
+Title: File Size pipe
+Added: v2.0.0
+Status: Active
+Last reviewed: 2018-11-14
+---
+
+# [File Size pipe](../../../lib/core/pipes/file-size.pipe.ts "Defined in file-size.pipe.ts")
+
+Converts a number of bytes to the equivalent in KB, MB, etc.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    File Size: {{ sizeInBytes | adfFileSize:"2" }}
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe chooses the largest unit that is less than the total number of bytes and
+divides the total by this number. This ensures that the number of units is greater
+than 1 (eg, you will see "512 Bytes" rather than "0.5KB"). The pipe parameter indicates
+the number of decimal places to use for the value, defaulting to 2 decimal places.

docs/core/pipes/format-space.pipe.md

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+---
+Title: Format Space pipe
+Added: v3.0.0
+Status: Active
+Last reviewed: 2018-11-27
+---
+
+# [Format Space pipe](../../../lib/core/pipes/format-space.pipe.ts "Defined in format-space.pipe.ts")
+
+Replaces all the white space in a string with a supplied character.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div [id]="'CHECK MY ID' | formatSpace">
+    BATTLESTAR GALACTICA
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe replaces each run of whitespace characters in the string with a single character
+(which is the underscore by default) and transforms the string to lowercase (eg, `test a pipe`
+becomes `test_a_pipe`).
+
+You can specify a different replacement character by passing it as a pipe parameter.
+You can also pass `false` to the `lowercase` parameter to skip the conversion to lowercase
+and just replace the whitespace.

docs/core/pipes/full-name.pipe.md

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+---
+Title: Full name pipe
+Added: v3.0.0
+Status: Active
+Last reviewed: 2018-11-12
+---
+
+# [Full name pipe](../../../lib/core/pipes/full-name.pipe.ts "Defined in full-name.pipe.ts")
+
+Joins the first and last name properties from a [`UserProcessModel`](../../core/models/user-process.model.md) object into a single string.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    Project Leader: {{ user | fullName }}
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe offers a convenient way to extract the name from a [User process model](../models/user-process.model.md) object.
+
+## See also
+
+-   [User initial pipe](user-initial.pipe.md)

docs/core/pipes/mime-type-icon.pipe.md

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+---
+Title: Mime Type Icon pipe
+Added: v2.0.0
+Status: Active
+---
+
+# [Mime Type Icon pipe](../../../lib/core/pipes/mime-type-icon.pipe.ts "Defined in mime-type-icon.pipe.ts")
+
+Retrieves an icon to represent a MIME type.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    <img src='{{ "image/jpeg" | adfMimeTypeIcon }}' />
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe takes a MIME type as input and returns the URL of an SVG file that
+symbolizes that type (see the [Thumbnail service](../services/thumbnail.service.md) for the mapping between types and icons). The pipe will return a "miscellaneous" icon when no specific mapping is defined.
+
+## See also
+
+-   [Thumbnail service](../services/thumbnail.service.md)

docs/core/pipes/node-name-tooltip.pipe.md

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+---
+Title: Node Name Tooltip pipe
+Added: v2.0.0
+Status: Active
+---
+
+# [Node Name Tooltip pipe](../../../lib/core/pipes/node-name-tooltip.pipe.ts "Defined in node-name-tooltip.pipe.ts")
+
+Formats the tooltip for a [`Node`](https://github.com/Alfresco/alfresco-js-api/blob/development/src/api/content-rest-api/docs/Node.md).
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```html
+<data-column
+    key="name"
+    title="APP.DOCUMENT_LIST.COLUMNS.NAME">
+    <ng-template let-value="value" let-context>
+        <span title="{{ context?.row?.obj | adfNodeNameTooltip }}">{{ value }}</span>
+    </ng-template>
+</data-column>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The tooltip is formatted according to the following rules:
+
+-   if the _title_ and _description_ are missing, then the tooltip shows the _name_;
+-   if the _title_ is missing, then the tooltip shows the _name_ and _description_;
+-   if the _description_ is missing, then the tooltip shows the _name_ and _title_;
+-   if _name_ and _title_, _name_ and _description_, or _title_ and _description_ are the same, then only a single line is displayed.

docs/core/pipes/text-highlight.pipe.md

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+---
+Title: Text Highlight pipe
+Added: v2.0.0
+Status: Active
+---
+
+# [Text Highlight pipe](../../../lib/core/pipes/text-highlight.pipe.ts "Defined in text-highlight.pipe.ts")
+
+Adds highlighting to words or sections of text that match a search string.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    Some rude words have been detected in your summary: {{ summary | highlight:rudeWordList }}
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe's parameter is a string to search for in the text. Any occurrences of the string will
+be highlighted with added HTML (see the
+[Highlight Transform service](../services/highlight-transform.service.md) for more information about how
+this is implemented). The parameter can contain spaces, in which case each separate "word" in the string will be highlighted individually.
+
+## See also
+
+-   [Highlight directive](../directives/highlight.directive.md)
+-   [Highlight transform service](../services/highlight-transform.service.md)

docs/core/pipes/time-ago.pipe.md

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+---
+Title: Time Ago pipe
+Added: v2.0.0
+Status: Active
+Last reviewed: 2018-11-19
+---
+
+# [Time Ago pipe](../../../lib/core/pipes/time-ago.pipe.ts "Defined in time-ago.pipe.ts")
+
+Converts a recent past date into a number of days ago.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    Last modified: {{ date | adfTimeAgo }}
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe finds the difference between the input date and the current date. If it
+is less than seven days then then the date will be formatted as "X days ago".
+Otherwise, the usual full date format is used.

docs/core/pipes/user-initial.pipe.md

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+---
+Title: User Initial pipe
+Added: v2.0.0
+Status: Active
+Last reviewed: 2018-11-12
+---
+
+# [User Initial pipe](../../../lib/core/pipes/user-initial.pipe.ts "Defined in user-initial.pipe.ts")
+
+Takes the name fields of a [`UserProcessModel`](../../core/models/user-process.model.md) object and extracts and formats the initials.
+
+## Basic Usage
+
+<!-- {% raw %} -->
+
+```HTML
+<div>
+    Project Leader: {{ user | usernameInitials:"initialsClass" }}
+</div>
+```
+
+<!-- {% endraw %} -->
+
+## Details
+
+The pipe gets the initial characters of the user's first and last names and
+concatenates them. The results are returned in an HTML &lt;div> element.
+
+The first pipe parameter specifies an optional CSS class to add to the &lt;div>
+element (eg, a background color is commonly used to emphasise initials). The
+second parameter is an optional delimiter to add between the initials.
+Both parameters default to empty strings.
+
+## See also
+
+-   [Full name pipe](full-name.pipe.md)