Implement ordering MVP domain layer per spec (issue #1)

Scaffolds the TanStack Start + Drizzle/Postgres + Better Auth app and
implements the core ordering domain: menu browsing, guest/account order
placement with online payment, per-Order-Item independent cooking and
cancellation, dynamic Machine-Tag pool assignment, and multi-step recipes
(see docs/adr/0001-0003). Adds a guest-access-token / session-based
ownership check on every read/mutation so an order can't be viewed,
cancelled, or picked up by anyone but its owner.

Covered by 14 tests running the domain layer directly against a real,
ephemeral Postgres (testcontainers) — createServerFn couldn't be called
outside a real request context, so tests exercise the domain functions the
server functions thinly wrap instead of the server functions themselves.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package.json

@@ -0,0 +1,65 @@
+{
+  "name": "ghost-kitchen",
+  "private": true,
+  "type": "module",
+  "imports": {
+    "#/*": "./src/*"
+  },
+  "scripts": {
+    "dev": "vite dev --port 3000",
+    "generate-routes": "tsr generate",
+    "build": "vite build",
+    "preview": "vite preview",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "drizzle-kit migrate",
+    "db:push": "drizzle-kit push",
+    "db:pull": "drizzle-kit pull",
+    "db:studio": "drizzle-kit studio",
+    "lint": "eslint",
+    "format": "prettier --write . && eslint --fix",
+    "check": "prettier --check .",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@tailwindcss/vite": "^4.1.18",
+    "@tanstack/react-devtools": "latest",
+    "@tanstack/react-router": "latest",
+    "@tanstack/react-router-devtools": "latest",
+    "@tanstack/react-start": "latest",
+    "better-auth": "^1.5.3",
+    "drizzle-kit": "^0.31.9",
+    "drizzle-orm": "^0.45.1",
+    "pg": "^8.16.3",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "stripe": "^22.6.1",
+    "tailwindcss": "^4.1.18",
+    "zod": "^4.5.4"
+  },
+  "devDependencies": {
+    "@tanstack/devtools-vite": "latest",
+    "@tanstack/eslint-config": "latest",
+    "@tanstack/router-cli": "^1.132.0",
+    "@testcontainers/postgresql": "^12.1.0",
+    "@types/node": "^22.10.2",
+    "@types/pg": "^8.15.6",
+    "@types/react": "^19.2.0",
+    "@types/react-dom": "^19.2.0",
+    "@vitejs/plugin-react": "^6.0.1",
+    "dotenv": "^17.3.1",
+    "eslint": "^9.20.0",
+    "prettier": "^3.8.1",
+    "tsx": "^4.21.0",
+    "typescript": "^6.0.2",
+    "vite": "^8.0.0",
+    "vitest": "^4.0.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild",
+      "lightningcss"
+    ]
+  }
+}