Handwired Cornedeon (Corne v3 plus)

Hard case for handwired improved Corne v3:

1. Monolithic body with integrated top plate.
2. Selfmade hot swap sockets [https://www.thingiverse.com/thing:7048966].
3. Corne v3 layout with 3 additional keys.
4. Type-C cable instead TRS.
5. Reserve for improvements (backlight, encoder).
6. Simplicity and maintainability.