feat: complete saleor core extensions app with React email templates

- Order confirmation, shipped, and cancelled email templates
- Uses @react-email/components for professional HTML emails
- Sends admin and customer notifications
- Integrates with Resend for email delivery
- Webhook handlers for ORDER_CREATED, ORDER_FULFILLED, ORDER_CANCELLED
- Docker image optimized for production
- Persistent auth data storage via PVC

.vscode/mcp.json

@@ -0,0 +1,11 @@
+{
+  "mcpServers": {
+    "mcp-saleor": {
+      "command": "npx",
+      "args": ["mcp-graphql"],
+      "env": {
+        "SCHEMA":"../graphql/schema.graphql"
+      }
+    }
+  }
+}