RP2040 Project Template

This is the project template I use for the RP2040. Removes the hassle of setting up `pico-sdk`, as it just clones it in the `Makefile`.

Easy to add other dependencies such as FreeRTOS, just add it to the Makefile and include it in the CMakeLists.txt

Derived from the work I did at Purdue Space Program (https://sagarpatil.me/projects/cms-avi-sw)