Suggestion: Only show machines that have Tailscale SSH available

[enriquein]

Hello, excellent job with the extension!

As someone with 40+ machines on our corporate tailnet, of which only about 12 or so have Tailscale SSH enabled, it would be of great help to be able to filter machines without Tailscale SSH out of the main group. Alternatively they could be grouped in a separate collapsible group (like what the extension already does with offline machines).

I love Tailscale, and having this extension as a value-add is incredible. Great job and thank you!