Read Receipts display with the user avatar (#1038)

* added the read receipt into the code

* fixed some things lost during merge

* implemented the status view to be always at the trailing side

* preview code for better testing

* removed timelineStyle modifier

* removed also the group style

* added some UI tests for the read receipts

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/DeveloperOptionsScreenModels.swift

@@ -27,10 +27,12 @@ struct DeveloperOptionsScreenViewState: BindableState {
 struct DeveloperOptionsScreenViewStateBindings {
     var shouldCollapseRoomStateEvents: Bool
     var userSuggestionsEnabled: Bool
+    var readReceiptsEnabled: Bool
 }
 
 enum DeveloperOptionsScreenViewAction {
     case changedShouldCollapseRoomStateEvents
     case changedUserSuggestionsEnabled
+    case changedReadReceiptsEnabled
     case clearCache
 }