[web] introduce user settings list item

Summary:
This diff introduces the settings list item. This component will be used in the settings list to swtich between the different user settings which I will introduce in a subsequent diff.

For context here is what the user settings list looks like in the figma:

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

Depends on D10610

Test Plan:
Please see the demo video below:

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10611