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

services/AGENTS.md

@@ -0,0 +1,12 @@
+# services/ — Backend Services
+
+Server-side modules that own authoritative game state.
+
+| Service | Protocol | Description |
+|---------|----------|-------------|
+| `spacetimedb` | SpacetimeDB TS module | Authoritative game backend: all tables, reducers, validation |
+
+## Key Files
+
+- `spacetime.json` (repo root) — points `module-path` at `./services/spacetimedb`
+- `spacetime.local.json` — local database name: `void-nav-dev`