Tags: mukulchugh/OpenKVM

Add branded README, MIT license, contributor guide, and good-first-is…

…sues

- New high-quality icon + banner (regenerated iconset/icns)
- README: download badges, Contributing section, Known issues linking
  Windows/Linux support and mouse-jitter good-first-issues
- Add MIT LICENSE
- Remove stale research/scratch files and old KeySwitch release artifact