MainBoardBRD: Add placeholder text for JLCPCB order number

MainBoardBRD: Add tooling holes, required by JLCPCB SMT assembly

hw: Add default V resistors, fix polygon Q1, prepare manufacturing data - add 0R resistors as default voltage selector for SJx - improve size of polygon for Q1 due to better cooling - prepare manufacturing data - renumber parts in schema - create `parts_SMT.xlsx` file with updated data - add CAM processor configuration

hw: add link to RoboticsBrno/eagle_libraries

ele/hw: clean and refactor project structure - rename folder `ele` to `hw` - remove folder `MainBoard` - to folder `hw` add folders `lib`,`configuration` and `designBlock` - rename `RBCX-MainBoard{.brd/.sch}` to `RBCX{.brd/.sch}`

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