[ADF-5252] Disable settings and about pages by default (#1750)

* move Settings readme to the plugin itself

* disable settings, update readme

* about plugin readme

* disable about module

docs/extending/README.md

@@ -16,7 +16,6 @@ Learn how to extend the features of the Alfresco Content Application.
 - [Actions](/extending/actions)
 - [Application actions](/extending/application-actions)
 - [Rules](/extending/rules)
-- [Settings](/extending/settings)
 - [Application features](/extending/application-features)
 - [Custom icons](/extending/icons)
 - [Registration](/extending/registration)

docs/extending/extending.md

@@ -1 +0,0 @@
-

docs/extending/settings.md

@@ -1,45 +0,0 @@
----
-Title: Settings
----
-
-# Settings
-
-The application settings can be accessed via the `/settings` route.
-
-You can project custom configuration groups via the `settings` section:
-
-```json
-{
-  "settings": [
-    {
-      "id": "extensions.ps.settings",
-      "name": "Extensions: Process Services",
-      "parameters": [
-        {
-          "name": "Enable Process Services Extensions",
-          "key": "processServices",
-          "type": "boolean",
-          "value": false
-        }
-      ]
-    }
-  ]
-}
-```
-
-At runtime, you are going to get an extra group called "Extensions: Process Services"
-with a custom boolean setting "Enable Process Services Extensions".
-
-![Custom settings group](../images/aca-settings-custom-group.png)
-
-## Parameters
-
-Each setting parameter object supports the following properties:
-
-| Property | Description                                     |
-| -------- | ----------------------------------------------- |
-| id       | (optional) Unique identifier                    |
-| name     | Public name, can be translation key             |
-| key      | The key to use when saving to the storage       |
-| type     | The type of the value (boolean / string)        |
-| value    | (optional) Default value to use for the setting |