[8/n] Native Typeahead - Create tooltip component in chat input bar

Summary:
Creating typeahead in ChatInputBar. There is one iOS bug/bad UX described and showed in a thread here: https://linear.app/comm/issue/ENG-2367/typeahead-in-tooltip-for-mentions-for-native

I'm putting up diffs regardless so they can be reviewed, but I can't find a way to fix it.
Adding @ashoat as blocking as the diff contains currently unsolved bug.

Test Plan:
Checked if app builds.
Video android:

Video iOS (showing bug with cursor not moving past name)

Reviewers: tomek, inka, ginsu, kamil, michal, ashoat

Reviewed By: tomek, ashoat

Subscribers: ashoat, atul, michal, kamil, ginsu, inka

Differential Revision: https://phab.comm.dev/D6390