[native] Add community drawer navigator

Summary:
Linear issue: https://linear.app/comm/issue/ENG-1881/community-navigation-drawer-on-native
Add a navigator for community drawer.

Test Plan: Tested with subsequent diffs.

Reviewers: tomek, atul, ginsu, kamil, bartek, ashoat

Reviewed By: tomek, ashoat

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D5732