Tinypilot network config change

[seandepagnier]

It's possible but it will take longer to establish the AP, and it won't know if openplotter becomes available later.

So in AP mode, it would make the AP sooner after boot.
In client mode it would reconnect to the AP always, so if openplotter starts later or restarts it can reconnect.

This would be a third mode. It might be more useful to switch from AP to client without rebooting somehow?