* Add SparkFun ESP32 MicroMod to boards.txt

Copied from the tarball found in the SparkFun board manager
[JSON](https://raw.githubusercontent.com/sparkfun/Arduino_Boards/main/IDE_Board_Manager/package_sparkfun_index.json),
v1.0.1 -- [tarball can be found here](https://github.com/sparkfun/Arduino_Boards/raw/main/IDE_Board_Manager/sparkfun-esp32-1.0.1.tar.bz2)

* Add `pins_arduino.h` for ESP32 MicroMod
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>