[native] Introduce CommunityCreationNavigator
Heavily inspired by RegistrationNavigator, this diff introduces CommunityCreationNavigator. This navigator will "handle" the screens of the community creation flow. Specifically the community configuration screen and the optional "Add members" screen.
WARNING: Please let me know if this is the wrong approach. My understanding is that because we have > 1 screen in sequence as part of our flow we should create a new navigation stack. HOWEVER, I have a very very limited understanding of navigation on native, so please correct me if that assumption is incorrect and I should approach this differently.
- Set isCommunityCreationButtonEnabled to true.
- Open community drawer and press "Create community."
- Observe that CommunityConfiguration is displayed (by looking at screen "title").
Reviewers: ashoat, ginsu
Reviewed By: ashoat
Differential Revision: https://phab.comm.dev/D7950