feat: initial commit — storefront, convex backend, and shared packages

Completes the first milestone of The Pet Loft ecommerce platform:
- apps/storefront: full customer-facing Next.js app with HeroUI (cart,
  checkout, orders, wishlist, product detail, shop, search, auth)
- convex/: serverless backend with schema, queries, mutations, actions,
  HTTP routes, Stripe/Shippo integrations, and co-located tests
- packages/types, packages/utils, packages/convex: shared workspace packages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/storefront/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "storefront",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --port 3000",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint",
+    "type-check": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@clerk/nextjs": "^6.38.2",
+    "@heroui/react": "^3.0.0-beta.7",
+    "@heroui/styles": "^3.0.0-beta.7",
+    "@repo/convex": "*",
+    "@repo/types": "*",
+    "@repo/utils": "*",
+    "@stripe/react-stripe-js": "^5.6.0",
+    "@stripe/stripe-js": "^8.8.0",
+    "framer-motion": "^11.0.0"
+  }
+}