add Routastic hardware model

[Jorropo]

What does this PR do?

Allow to differentiate nodes running my own implementation VS meshtastic's code.

Checklist before merging

• All top level messages commented
• All enum members have unique descriptions

[Jorropo]

Copy pasting of my discord question:

For my new implementation I want to indicate I'm not using meshtastic's firmware in the nodeinfo.
Would you mind if I highjack the hardware field to indicate Routastic similar to PORTDUINO ? (just add a new enum entry)
Or should there be two fields one for the hardware and one for the implementation ? I think that make most sense but imo that overcomplicated I'll be running on linux exclusively and I doubt there will be dedicated hardware worth differentiating for anytime soon.