[web] introduce keyserver selection list item
Summary:
introduce KeyserverSelectionListItem component. This component will be used in the keyserver selection list.
For context here are the figma designs:
Linear task: https://linear.app/comm/issue/ENG-5493/introduce-keyserver-list-item-ui
Depends on D9905
Test Plan:
Please see screenshots below (please note the blue add button is temporary and is not part of this diff)
Reviewers: inka, rohan, michal
Reviewed By: inka
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D9891