[web] fix user profile long username bug

Summary:
This diff fixes the bug where we had text overflow with longer usernames. To address this I introduced a version of SingleLine for web.

For context here is the native version of SingleLine
https://github.com/CommE2E/comm/blob/master/native/components/single-line.react.js

Linear task: https://linear.app/comm/issue/ENG-5372/fix-user-profiles-for-long-usernames

Test Plan:
Please see screenshots below

Before:

after:

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ted, ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9604