reform2: update PCBs incl. badges to production revs, add keyboard lettering, misc docs

.gitignore

reform2-3d-assembly/reform2-batterypack.step.gz

reform2-3d-assembly/reform2-keyboard.step.gz

reform2-3d-assembly/reform2-oled.step.gz

reform2-3d-assembly/reform2-trackball-pcb.step.gz

reform2-3d-assembly/reform2-trackball-sensor.step.gz

reform2-3d-assembly/reform2-trackpad.step.gz

reform2-3d-printed-parts/reform2-wifi-antenna-rect.svg

reform2-batterypack-pcb/fp-info-cache

reform2-batterypack-pcb/reform2-batterypack-cache.lib

reform2-batterypack-pcb/reform2-batterypack.kicad_pcb

reform2-batterypack-pcb/reform2-batterypack.lib

...m2-batterypack.pretty/reform2-batterypack-badge.kicad_mod

reform2-batterypack-pcb/reform2-batterypack.pro

reform2-batterypack-pcb/reform2-batterypack.sch

reform2-heatsink/reform2-heatsink.scad

reform2-keyboard-pcb/assembly-components.csv

reform2-keyboard-pcb/fp-info-cache

...2-keyboard-v5-lettering-neo2-medium-b-paths-destretch.plf

...ing/reform2-keyboard-v5-lettering-neo2-medium-b-paths.svg