[ADF-4152] Restructured Content Services docs (#4429)

* [ADF-4152] Moved content services docs to subfolders

* [ADF-4152] Manual URL fixes for cont services docs

* [ADF-4152] Moved content services docs to subfolders

* [ADF-4152] Manual URL fixes for cont services docs

* [ADF-4152] Updated doc index pages for content services

docs/content-services/components/search-radio.component.md

@@ -0,0 +1,68 @@
+---
+Title: Search radio component
+Added: v2.4.0
+Status: Active
+Last reviewed: 2018-08-10
+---
+
+# [Search radio component](../../../lib/content-services/search/components/search-radio/search-radio.component.ts "Defined in search-radio.component.ts")
+
+Implements a radio button list widget for the [Search Filter component](search-filter.component.md).
+
+![Radio Widget screenshot](../../docassets/images/search-radio.png)
+
+## Basic usage
+
+```json
+{
+    "search": {
+        "categories": [
+            {
+                "id": "queryType",
+                "name": "Type",
+                "enabled": true,
+                "component": {
+                    "selector": "radio",
+                    "settings": {
+                        "field": null,
+                        "pageSize": 5,
+                        "options": [
+                            { "name": "None", "value": "" },
+                            { "name": "All", "value": "TYPE:'cm:folder' OR TYPE:'cm:content'" },
+                            { "name": "Folder", "value": "TYPE:'cm:folder'" },
+                            { "name": "Document", "value": "TYPE:'cm:content'" }
+                        ]
+                    }
+                }
+            }
+        ]
+    }
+}
+```
+
+### Settings
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| options | `array` | Array of objects with `name` and `value` properties. Each object defines a radio button, labelled with `name`, that adds the query fragment in `value` to the query when enabled. |
+
+## Details
+
+This component displays a list of radio buttons, each of which toggles a particular
+query fragment in the search. This behaviour is very similar to that of the
+[Search check list component](search-check-list.component.md) except only one item at a time can be selected. See the
+[Search filter component](search-filter.component.md) for full details of how to use the widgets in a search query.
+
+The component can be set to split a long list of buttons into separate pages
+using the `pageSize` value as the number of buttons to show per page (default is 5).
+When there is more than one page, the widget will display "Show more" and "Show less"
+buttons as appropriate.
+
+## See also
+
+-   [Search filter component](search-filter.component.md)
+-   [Search check list component](search-check-list.component.md)
+-   [Search date range component](search-date-range.component.md)
+-   [Search number range component](search-number-range.component.md)
+-   [Search slider component](search-slider.component.md)
+-   [Search text component](search-text.component.md)