Restructure into pnpm monorepo with game shell, docs, and SpacetimeDB backend

- Restructure flat static prototype into pnpm workspace monorepo
- apps/game: playable shell with R3F 3D scene, HUD, SpacetimeDB connection
- apps/docs: design docs and prototypes
- apps/site: landing page
- packages/ui: shared Button and Panel primitives
- services/spacetimedb: backend module (9 tables, 11 reducers)
- Archive legacy static files to archive/legacy-static/
- Game loop: connect, undock, target, approach, dock, mine, sell
- Add pnpm-workspace.yaml, tsconfig.base.json, spacetime.json

apps/docs/src/App.tsx

@@ -0,0 +1,82 @@
+import { Navigate, Route, Routes } from "react-router-dom";
+import { DocsLayout } from "./layouts/DocsLayout";
+import { NotFound } from "./components/NotFound";
+import { OverviewPage } from "./pages/docs/OverviewPage";
+import { ArchitecturePage } from "./pages/docs/ArchitecturePage";
+import { TechStackPage } from "./pages/docs/TechStackPage";
+import { BackendPage } from "./pages/docs/BackendPage";
+import { AgentsPage } from "./pages/docs/AgentsPage";
+import { GameplayPage } from "./pages/docs/GameplayPage";
+import { ShipsPage } from "./pages/docs/ShipsPage";
+import { EconomyPage } from "./pages/docs/EconomyPage";
+import { SocialPage } from "./pages/docs/SocialPage";
+import { ShipAIPage } from "./pages/docs/ShipAIPage";
+import { RoadmapPage } from "./pages/docs/RoadmapPage";
+import { RisksPage } from "./pages/docs/RisksPage";
+import { DemoGalleryPage } from "./pages/docs/DemoGalleryPage";
+import { GapAnalysisPage } from "./pages/docs/GapAnalysisPage";
+import { VerticalSliceEvaluationPage } from "./pages/docs/VerticalSliceEvaluationPage";
+import { DesignDocPage } from "./pages/docs/DesignDocPage";
+import { StarMapDemo } from "./prototypes/existing-demos/StarMapDemo";
+import { ShipMovementDemo } from "./prototypes/existing-demos/ShipMovementDemo";
+import { WarpTravelDemo } from "./prototypes/existing-demos/WarpTravelDemo";
+import { GameLoopSliceDemo } from "./prototypes/existing-demos/GameLoopSliceDemo";
+import { CombatDemo } from "./prototypes/existing-demos/CombatDemo";
+import { MarketDemo } from "./prototypes/existing-demos/MarketDemo";
+import { FittingDemo } from "./prototypes/existing-demos/FittingDemo";
+import { RefiningDemo } from "./prototypes/existing-demos/RefiningDemo";
+import { ProgressionDemo } from "./prototypes/existing-demos/ProgressionDemo";
+import { BountyDemo } from "./prototypes/existing-demos/BountyDemo";
+import { GameHudDemo } from "./prototypes/existing-demos/GameHudDemo";
+import { ChatDemo } from "./prototypes/existing-demos/ChatDemo";
+import { ZoraDemo } from "./prototypes/existing-demos/ZoraDemo";
+import { GalaxyDemo } from "./prototypes/existing-demos/GalaxyDemo";
+import { GameHudPrototype } from "./prototypes/standalone-huds/GameHudPrototype";
+
+export function App() {
+  return (
+    <Routes>
+      <Route path="/" element={<Navigate to="/docs" replace />} />
+
+      <Route path="/docs" element={<DocsLayout />}>
+        <Route index element={<Navigate to="/docs/overview" replace />} />
+        <Route path="overview" element={<OverviewPage />} />
+        <Route path="architecture" element={<ArchitecturePage />} />
+        <Route path="tech-stack" element={<TechStackPage />} />
+        <Route path="backend" element={<BackendPage />} />
+        <Route path="agents" element={<AgentsPage />} />
+        <Route path="gameplay" element={<GameplayPage />} />
+        <Route path="ships" element={<ShipsPage />} />
+        <Route path="economy" element={<EconomyPage />} />
+        <Route path="social" element={<SocialPage />} />
+        <Route path="ship-ai" element={<ShipAIPage />} />
+        <Route path="roadmap" element={<RoadmapPage />} />
+        <Route path="risks" element={<RisksPage />} />
+        <Route path="demo-gallery" element={<DemoGalleryPage />} />
+        <Route path="gap-analysis" element={<GapAnalysisPage />} />
+        <Route path="vertical-slice-evaluation" element={<VerticalSliceEvaluationPage />} />
+        <Route path="design-doc" element={<DesignDocPage />} />
+
+        <Route path="demos/starmap" element={<StarMapDemo />} />
+        <Route path="demos/game-loop" element={<GameLoopSliceDemo />} />
+        <Route path="demos/movement" element={<ShipMovementDemo />} />
+        <Route path="demos/warp" element={<WarpTravelDemo />} />
+        <Route path="demos/combat" element={<CombatDemo />} />
+        <Route path="demos/market" element={<MarketDemo />} />
+        <Route path="demos/fitting" element={<FittingDemo />} />
+        <Route path="demos/refining" element={<RefiningDemo />} />
+        <Route path="demos/progression" element={<ProgressionDemo />} />
+        <Route path="demos/bounty" element={<BountyDemo />} />
+        <Route path="demos/game-hud" element={<GameHudDemo />} />
+        <Route path="demos/chat" element={<ChatDemo />} />
+        <Route path="demos/zora" element={<ZoraDemo />} />
+        <Route path="demos/galaxy" element={<GalaxyDemo />} />
+
+        <Route path="prototypes/game-hud" element={<GameHudPrototype />} />
+        <Route path="*" element={<NotFound />} />
+      </Route>
+
+      <Route path="*" element={<NotFound />} />
+    </Routes>
+  );
+}