Rev 1.1 of the PCB

Changelog:
- created ground planes on both sides. R11 is obsolete. Tests have to show if they interfere with Wifi signal. If so, the antenna area has to be spared out more consequently.
- rerouted the board on 2 sides. No difference in cost if 1 or 2 sided PCB.
- increased the trace width to 50mil (1,27mm) for less resistance and more consistent resistance values between traces.
- test boards are ordered, real world tests have to show if this revision is viable. No commit to main branch before validation!

Author: ClaudeWolter