Further design updates to the timeline. (#524)

- Decryption banner on the timeline
- Bubble colours
- Background insets
- Multiline composer corner radius
- Read marker
- GIF indicator
- Reactions shape
- Use RoomTimelineViewLabelStyle everywhere possible
- Only set a line limit on reply quotes, allow all the lines for regular quotes.
- Message label icons
- Yes/No button casing
- Make sender profiles immutable.
- Enable copy link and invite buttons.
- Fix layout loop detecting multiline composer text.
- Add animation to the encryption banner.

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -53,6 +53,7 @@ enum RoomScreenViewAction {
     case cancelEdit
     /// Mark the entire room as read - this is heavy handed as a starting point for now.
     case markRoomAsRead
+    case retryDecryption
     case contextMenuAction(itemID: String, action: TimelineItemContextMenuAction)
 }
 
@@ -63,6 +64,7 @@ struct RoomScreenViewState: BindableState {
     var items: [RoomTimelineViewProvider] = []
     var canBackPaginate = true
     var isBackPaginating = false
+    var showEncryptionBanner = false
     var showLoading = false
     var bindings: RoomScreenViewStateBindings