Split relay.ts into protocol.ts (constants, binary helpers), gameroom.ts
(Durable Object), and a thin relay.ts entry point. Replace magic numbers
with named constants matching protocol.h. Run wrangler directly as PID 1
in Docker so Ctrl+C shuts down gracefully instead of being swallowed by npx.
Add serialization framework using C++ templates and table-driven lookup
to sync plant and building state between players. Includes world snapshot
routing to requesting peer, relay server Docker support, and fixes for
building color sync, ride vehicle visibility, and ARM compilation.
