- Adds `ModalBottomSheet` to our design components (it wraps the homonimous Material3 one).
- Adds a bottom sheet to the Room list using the aforementioned design component.
- Adds navigation from the room list to a room detail (context menu "Settings" action).
- Consolidates the "leave room flow" into a new `leaveroom` module used by both the room list and the room details.
- Adds progress indicator to the leave room flow
- Uses new `leaveroom` module in `roomdetails` module too.
Parent issue:
- https://github.com/vector-im/element-x-android/issues/261
