Update electronics tutorial

website/tutorial/electronics/images/pinout_rp2040.png

website/tutorial/electronics/images/pinout_rp2350a.png

website/tutorial/electronics/index.md

website/tutorial/images/3D_view.png

website/tutorial/images/footprint_error.png

website/tutorial/images/kicad_add_symbol.png

website/tutorial/images/led_schematic.png

website/tutorial/images/pick_component.png

website/tutorial/images/pico_powerchain.png

website/tutorial/images/power_symbol.png

website/tutorial/images/route_tracks.png

website/tutorial/images/update_pcb_1.png

website/tutorial/images/update_pcb_2.png

website/tutorial/kicad.md