Onboard emulator

[LouDnl]

• Add emulation mode (Will possibly require a Pico 2 due to memory limitation of the Pico 1 and Pico_w)
  • SID play
    • Implementation
    • that reads a complete SID file
      • over USB
      • over uart
    • plays the SID on second core
    • optionally send back register data over USB
  • Embedded version of Cynthcart
    • Implementation
    • Input over midi
    • Disable unused CC commands when active
    • Seperate Cynthcart only firmware that only runs Cynthcart