[ADF-2201] Search Configuration doc (#2876)

* [ADF-2201] Updated search component docs and tidied index page

* [ADF-2201] Fixed incorrect link

* [ADF-2201] Updated docs based on feedback

* [ADF-2201] Fixed broken relative link

docs/sites.service.md

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+# Sites Api service
+
+Accesses and manipulates sites from a Content Services repository.
+
+## Methods
+
+`getSites(opts: any = {}): any`<br/>
+Gets a list of all sites in the repository.
+
+`getSite(siteId: string, opts?: any): any`<br/>
+Gets the details for a site.
+
+`deleteSite(siteId: string, permanentFlag: boolean = true): any`<br/>
+Deletes a site.
+
+`getSiteContent(siteId: string): Observable<any>`<br/>
+Gets a site's content.
+
+`getSiteMembers(siteId: string): Observable<any>`<br/>
+Gets a list of all a site's members.
+
+## Details
+
+You can use `getSites` to get a list of all sites in the repository.
+The sites are returned as `Observable<SiteModel[]>` (see
+[Site Model](site.model.md) for more information about this class).
+If you are only interested in a single site and you have its ID, you
+can use `getSite` to access it. Alternatively, you can use `getSiteContent`
+or `getSiteMembers` to extract just the `contents` and `members` properties
+of the site.
+
+You can also delete a site using `deleteSite`. If the `permanentFlag` parameter
+is set to false then the site will be moved to the trash rather than being
+deleted immediately.
+
+Both `getSite` and `getSites` have an `opts` parameter to supply extra
+options. See the Alfresco JS API docs about
+[getSites](https://github.com/Alfresco/alfresco-js-api/blob/master/src/alfresco-core-rest-api/docs/SitesApi.md#getSites)
+and
+[getSite](https://github.com/Alfresco/alfresco-js-api/blob/master/src/alfresco-core-rest-api/docs/SitesApi.md#getSite)
+for more information about the available options.
+
+## See also
+
+-   [Site model](site.model.md)