USB connection from piggui to porky

[andrewdavidmackenzie]

So far, I've been using a Raspberry Pi, or Pi Pico W for the GPIO control - and assuming Wifi access from the device for "remote control" from the GUI.

As the need for ocnfiguring the wifi of Pi Pico W came up, one idea was via USB from Piggui.

That made me think of this idea: to add USB between host (piggui) and Pico (porky) as an option in addition to network (tcp, iroh).

The advantages of this:

• extends devices supported to those without Wifi (Pi Pico and others)
• makes it easy to use (just plug in the device with USB) and need less or no config of the device
• would enable us to config the wifi of the device if it has it, for later disconnected (via USB) use

[andrewdavidmackenzie]

Implemented, but stuggling to get working with correct host config to DHCP it...