CLAUDE.md and README.md described the pre-multiplayer state (local-only
MVP, planned C# backend) even though server-authoritative multiplayer,
the dedicated server, Docker/CI verification, and Steam transport have
since shipped (Phases 1-6). Update both to reflect reality and add a
docs index in CLAUDE.md pointing at multiplayer-next.md as the current
checklist.
- Add docs/TECH_STACK.md, linked from README, explaining the stack and
why it's a single GDScript project with no separate backend.
- Add one TODO item for the video settings menu (missing presets/vsync/
resolution scaling), blocked on the same profiling gate as the
multiplayer 0.17 tasks.
- Pick up editor-generated .gd.uid sidecars and minor project.godot
formatting noise from opening the project in Godot 4.7.