scripts: Create and populate scripts directory

Since multiple scripts have recently been added, clean up the main
directory by moving them into a separate directory dedicated to scripts.
scripts: General cleanup and adaptation

Make sure all script headers are formatted alike. Also, make scripts
compatible with new location within the AB2 KiCad path structure.
modules: logo: Remove 3.3 logo

Inconsistent with others -- move away from this
modules: logo: Add various sizes