README for the repo page; HOW-IT-WORKS overview; ARCHITECTURE,
PROTOCOL, DEVELOPMENT checked against the code; ROADMAP is backlog
only (isolate/dedicated server, sync fixes, rendering+shaders,
Windows build, Jellyfin epic). HANDOFF.md and mpv-http-contract.md
folded in and deleted.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
