Added PCB design from @johnedgarpark so you can create your own Pico based mini NES.
Use pico_nesPCB.zip when ordering a PCB from a manufacturer of your choice.
For the PCB, the Pico needs to be flashed with piconesPlusAdaFruitDVISD.uf2
Emulator: Added more credits to the splash screen.
See readme section how to install and wire up
