MainBoard: fix motors signals, improve silkscreen - fix JST connector layout for M1 and M2 - switch all pins to be compatible with chines motors with encoders - switch encoders signal on the coprocessor - fix direction/position of silkscreen text - move some vias due to silkscreen - add `esp32.lbr` library - improve silkscreen in `esp32.lbr` and `CR2032-circle.lbr` to fit on RBCX

MainBoardBRD: improve top and bottom silkscreen

MainBoardBRD: Add bottom silkscreen and improve top silkscreen

MainBoardBRD: Add basic topside silkscreen

MainBoardBRD: Mirror servos step-down enable pin

MainBoard: Fix microUSB pinout, add some tSilk

MainBoardSCH: Reorder sheets and renumber parts

MainBoardBRD: Add isolation cutout polygon around analog ground vias

MainBoardBRD: Fix DRC errors

MainBoard: Fix USB connectors, ROUTED