[web] introduce UserProfileMenu

Summary:
This diff introduces the UserProfileMenu component. This component handles showing the correct relationship action options based on what the current relationship status of the viewer and the profile is.

Here are the figma designs:

When user is a friend:

When viewer is blocked (couldn't find native designs but the concept is the same here):

When user is blocked by viewer:

When there is no relationship status between user/viewer, or there is a pending friend request in either direction:

Part of https://linear.app/comm/issue/ENG-5225/introduce-userprofilemenu

Depends on D9456

Test Plan:
Please see the screenshots below. Also confirmed that the actions worked as expected

When user is a friend:

When viewer is blocked:

When user is blocked by viewer:

When there is no relationship status between user/viewer, or there is a pending friend request in either direction:

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9457