[FEAT] tailscale set --webclient

[GarrisonD]

Be able to enable webclient feature easily with artis3n.tailscale.machine role.

Or it would be even better to be able to set any option in some generic way.

[sylr]

Any tailscale set option would be great, I'd like to use --relay-server-static-endpoints & --relay-server-port.

Thank you.