Prepare publish-ready cleanup
PR: https://github.com/galenp/legends-of-war-age2/pull/1
Summary
- add Docker publish/runtime flow and smoke testing
- prune legacy website integrations and Intermud support
- update setup, admin, and game mechanics documentation
- clean up selected warning-heavy code paths and VS Code build/debug tasks
Verification
- src make build
- Docker smoke test completed successfully