MainBoardSCH: Add P channel power MOSFETs gate voltage spikes protection

MainBoard: Add P channel power MOSFETs value

Modify the PIO example

fw: add PlatformIO test project

MainBoard: Remove motors terminal block, leave only pinheads

MainBoardBRD: move mounting holes closer to the board edge

MainBoardBRD: Mirror THT connectors and capacitors, battery holder and buzzer

MainBoard: Replace SMD buttons with THT

MainBoard: Replace UIboard connector and expander connector with FFC/FPC connectors

MainBoard: Remove iLed stepdown and some bulk capacitors, change bulk capacitors package to THT