[web] Add community drawer

Summary:
Linear issue: https://linear.app/comm/issue/ENG-2631/drawer-sidebar-inside-of-community-picker
Adding the community drawer.
Adding the community drawer on native: D5723 and D5732

Test Plan: added community drawer to AppsDirectory, checked that it behaves as expected.

Reviewers: przemek, michal, ginsu, tomek

Reviewed By: tomek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6162