Integrate searching public rooms and people into the new search experience (#8707)

* Implement searching for public rooms and users in new search experience
* Implement loading indicator for spotlight results
* Moved spotlight dialog into own subfolder
* Extract search result avatar into separate component
* Build generic new dropdown menu component
* Build new network menu based on new network dropdown component
* Switch roomdirectory to use new network dropdown
* Replace old networkdropdown with new networkdropdown
* Added component for public room result details
* Extract hooks and subcomponents from SpotlightDialog
* Create new hook to get profile info based for an mxid
* Add hook to automatically re-request search results
* Add hook to prevent out-of-order search results
* Extract member sort algorithm from InviteDialog
* Keep sorting for non-room results stable
* Sort people suggestions using sort algorithm from InviteDialog
* Add copy/copied tooltip for invite link option in spotlight
* Clamp length of topic for public room results
* Add unit test for useDebouncedSearch
* Add unit test for useProfileInfo
* Create cypress test cases for spotlight dialog
* Add test for useLatestResult to prevent out-of-order results

res/css/views/dialogs/_InviteDialog.scss

@@ -160,14 +160,14 @@ limitations under the License.
         padding-right: 8px;
         color: #ffffff; // this is fine without a var because it's for both themes
 
-        .mx_InviteDialog_userTile_avatar {
+        .mx_SearchResultAvatar {
             border-radius: 20px;
             position: relative;
             left: -5px;
             top: 2px;
         }
 
-        img.mx_InviteDialog_userTile_avatar {
+        img.mx_SearchResultAvatar {
             vertical-align: top;
         }
 
@@ -175,7 +175,7 @@ limitations under the License.
             vertical-align: top;
         }
 
-        .mx_InviteDialog_userTile_threepidAvatar {
+        .mx_SearchResultAvatar_threepidAvatar {
             background-color: #ffffff; // this is fine without a var because it's for both themes
         }
     }