[web] Add expand buttons

Summary:
Add buttons to be used in community drawer to expand items.
Related issue
The same buttons on native : D5718

Test Plan: Displayed buttons in AppSwitcher, checked that they display as expected and onClick works

Reviewers: przemek, michal, ginsu, tomek

Reviewed By: przemek, tomek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6158