Removed "label" properties which no longer have any function. Labels are still used as layer names and as identifiers for sending behaviors between sides of a split keyboard, so those have been left alone for now.
Standardized indentation to use spaces with a new pre-commit hook.
Baseline config and overlay for the following: * `rpi_pico` * `adafruit_kb2040` * `sparkfun_pro_micro_rp2040` * `adafruit_qt_py_rp2040` * `seeeduino_xiao_rp2040` * `boardsource_blok` * `01space_rp2040_042lcd` Co-authored-by: Joel Spadin <joelspadin@gmail.com>