[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/text-highlight.pipe.md

@@ -0,0 +1,33 @@
+---
+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)