Room details screen (#348)

* Create screen module

* Display details on header tap

* Add strings

* Add room avatar size on details

* Update members method signature

* Use room proxy values

* Create room members screen

* Display room members on tap

* Update previews and mock room proxy

* Commit project file

* Various tweaks and cleanup following code review

* More small tweaks + UI and screenshot tests

Co-authored-by: Stefan Ceriu <stefanc@matrix.org>

ElementX/Sources/Other/AvatarSize.swift

@@ -45,6 +45,7 @@ enum UserAvatarSizeOnScreen {
     case timeline
     case home
     case settings
+    case roomDetails
 
     var value: CGFloat {
         switch self {
@@ -54,6 +55,8 @@ enum UserAvatarSizeOnScreen {
             return 32
         case .settings:
             return 60
+        case .roomDetails:
+            return 32
         }
     }
 }
@@ -61,6 +64,7 @@ enum UserAvatarSizeOnScreen {
 enum RoomAvatarSizeOnScreen {
     case timeline
     case home
+    case details
 
     var value: CGFloat {
         switch self {
@@ -68,6 +72,8 @@ enum RoomAvatarSizeOnScreen {
             return 32
         case .home:
             return 44
+        case .details:
+            return 100
         }
     }
 }