[web] introduce user settings list

Summary:
This diff introduces the user settings list component. This component will be used to switch between the various comm user settings.

For context here is what the figma designs look like:

Linear task: https://linear.app/comm/issue/ENG-5952/settings-list-ui

Depends on D10611

Test Plan:
Please see the screenshot below

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10612