Add game UI panels, keyboard shortcuts, docs narrative overhaul, and unified dev script

- Add MiniStarMap, NpcMarketPanel, ShipStatusPanel, useKeyboardShortcuts
- Add progress bars for approach/mining operations and cargo fill indicator
- Rewrite docs from spreadsheet-first to exploration-first open-world RPG
- Replace dev:db + dev:standalone with unified dev script (scripts/dev.sh)
- Add Vite chunk splitting for three.js and spacetimedb
- Fix displayName dependency in useSpacetimeConnection
- Remove stale usePlayerSession.ts
- Add AGENTS.md files across all packages

scripts/AGENTS.md

@@ -0,0 +1,11 @@
+# scripts/ — Dev Tooling
+
+Shell scripts for development workflow automation.
+
+## Files
+
+| Script | Purpose |
+|--------|---------|
+| `dev.sh` | Full-stack dev startup: starts fresh SpacetimeDB instance, publishes module, generates bindings, launches game dev server |
+
+Run via `pnpm dev` from the repo root. Uses an isolated ephemeral data directory (`.spacetime-dev/`) so it starts clean every time.