chore: RoomLayout loading improves (#30066)

apps/meteor/client/views/room/Header/HeaderSkeleton.tsx

apps/meteor/client/views/room/Room.tsx

apps/meteor/client/views/room/Room/ComposerSkeleton.tsx

apps/meteor/client/views/room/RoomOpener.tsx

apps/meteor/client/views/room/RoomSkeleton.tsx

apps/meteor/client/views/room/body/DropTargetOverlay.tsx

...client/views/room/body/ErroredUploadProgressIndicator.tsx

...teor/client/views/room/body/JumpToRecentMessageButton.tsx

apps/meteor/client/views/room/body/LeaderBar.tsx

...eteor/client/views/room/body/LoadingMessagesIndicator.tsx

.../meteor/client/views/room/body/RetentionPolicyWarning.tsx

apps/meteor/client/views/room/body/RoomBody.tsx

...teor/client/views/room/body/RoomForeword/RoomForeword.tsx

...views/room/body/RoomForeword/RoomForewordUsernameList.tsx

...s/room/body/RoomForeword/RoomForewordUsernameListItem.tsx

...meteor/client/views/room/body/UnreadMessagesIndicator.tsx

...meteor/client/views/room/body/UploadProgressIndicator.tsx

apps/meteor/client/views/room/body/hooks/useDropTarget.ts

...r/client/views/room/body/hooks/useFileUploadDropTarget.ts

...teor/client/views/room/body/hooks/useGoToHomeOnRemoved.ts