pico audio template

a starter project for rp2040 audio projects

todo

create script for updating the sdk

git subtree pull --prefix pico/sdk git@github.com:raspberrypi/pico-sdk master
git subtree pull --prefix pico/extras git@github.com:raspberrypi/pico-extras master

create script for setting the project name

replace sound_program in CMakeLists.txt with program name