Coder Inbox Web UI

[defelmnq]

Part of the main PR visible here.

This PR scope is to create the Web UI component for the Coder Inbox.

It depends on #335 - API Endpoints endpoints.

The scope of this PR is everything associated to the Web UI from the icon on topbar to list of notifications and pagination.

[mtojek]

@BrunoQuaresma As we talked during Weekly on Monday, it seems to be not a blocker anymore. Can you please flush out the scope of changes?

[BrunoQuaresma]

@defelmnq would make sense to transform #339, #243, #1641 into sub-issues of this one?

[BrunoQuaresma]

@mtojek same as coder/coder#16422 (comment)

[BrunoQuaresma]

Unblocking this for now since I can work on it creating a new branch from the one on this notifications BE PR.