* Space flow improvements
- Use a state machine to select a space.
- Add a SpaceFlowCoordinator for recursively presenting subspaces.
- Get the spaceRoomListProxy when tapping on the space so we can indicate failures.
- Fix the total room count in SpaceListScreen.
* Refactor spaceRoom → spaceRoomProxy.
* Add a UI test for the Spaces flow.
* Add a SpaceExplorerFlowCoordinator.
* Project tweaks
- iOS 17.5 so that we can use the simulator.
- Make a Spaces group for common Space related views.
- Fix the tab bar badge colour on iPhone landscape and iPadOS 17 (18 is still wrong 😒)