[lib/web/native] Show and search resolved ENS names in @ mentioning toolip

Summary:
In this diff, we modify the @ mentioning tooltip for users to display resolved ENS names and also to allow users to type out ENS names and still get a match. For example, for a user imbatman.eth, if I type @ followed by '0x', I should see imbatman.eth. I should also be able to see this if I type '@im' now.

Because of these changes, we're able to remove unused code in user-selectors.

Bolding ENS name mentions will come in the next diff

Depends on D10386

Addresses https://linear.app/comm/issue/ENG-5073/update-client-to-detect-ens-names-for-wallet-addresses

Test Plan:
Please see the videos below for both web, native and native (prod build)

web:

native:

native (prod build):

Reviewers: atul, ginsu, inka

Reviewed By: inka

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10387