Room's details edit screen (#956)

* Add RoomDetailsEditScreen template

* Add navigation to the edit screen

* Delete template code

* Start RoomDetailsEditScreen UI

* Manage power levels in RoomDetailsScreen

* Start RoomDetailsEditScreenViewModel logic

* Inject initial room state

* Add cancel action

* Expose set name/topic APIs in RoomProxy

* Refine RoomDetailsEditScreen UI

* Add save logic

* Add localisations

* Fix avatar image

* Update localisations

* Add “Add topic” button

* Add feature flag

* Add dismiss on save logic

* Reduce throttling

* Improve form logic

* Fix UT build errors

* Add media sheet

* Add media preprocessing

* Add LoadableEditableAvatarImage

* Add condition on delete image

* Add avatar save button logic

* Add remove avatar logic

* Cleanup

* Fix edit bug in DM

* Add upload avatar

* Add focus

* Add RoomDetailsViewModel UTs

* Fix button style

* Add UTs

* Add empty topic ui test

* Fix iPad sheet presentation

* Revert topic appearance in room’s details

* Address PR comments

* Add UI tests

ElementX/Sources/Application/AppSettings.swift

@@ -29,6 +29,7 @@ final class AppSettings {
         case shouldCollapseRoomStateEvents
         case startChatFlowEnabled
         case startChatUserSuggestionsEnabled
+        case editRoomDetailsFlowEnabled
         case invitesFlowEnabled
         case inviteMorePeopleFlowEnabled
         case readReceiptsEnabled
@@ -196,4 +197,9 @@ final class AppSettings {
 
     @UserPreference(key: UserDefaultsKeys.readReceiptsEnabled, defaultValue: false, storageType: .userDefaults(store))
     var readReceiptsEnabled
+    
+    // MARK: Room details edit
+
+    @UserPreference(key: UserDefaultsKeys.editRoomDetailsFlowEnabled, defaultValue: false, storageType: .userDefaults(store))
+    var editRoomDetailsFlowEnabled
 }