Build the tray menu

[spikecurtis]

Coder Desktop's primary interface at this stage is a tray menu. It shows the follow status information:

1. Coder deployment URL
2. The current logged in (Coder) user
3. Whether the CoderVPN function is enabled
4. Whether the CoderVPN function is operating without error
5. For each of the user’s workspaces:
   1. Name
   2. Status (e.g. stopped, starting, running)
   3. Whether the CoderVPN is connected to all agents
   4. Ping latency in milliseconds to the first agent
6. Clicking a workspace in the menu MUST open the workspace in the Coder web dashboard.

It should use the native UX kit as much as possible.