* use pragma once
* remove custom matrix
* remove custom i2c code in favor of QMK's i2c_master
* rename to all lower case readme
* update readme
* turn off bootmagic as it doesn't work anyway
* Update keyboards/pearl/readme.md
Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
MechMerlin