Added Stackblitz template

Author: alvarosabu

README.md

@@ -37,6 +37,7 @@ Complete documentation and examples available at
 
 - **[Documentation](https://vue-dynamic-forms.alvarosaburido.dev/)**
 - **[Demos](#demos)** or if you prefer online [here](https://vue-dynamic-forms-demos.alvarosaburido.dev/)
+- **[Stackblitz](https://stackblitz.com/edit/vitejs-vite-e5dxci?file=src%2FApp.vue&terminal=dev)**
 - **[Code Sandbox](https://codesandbox.io/s/vue-dynamic-forms-3xx-wfpix?file=/src/App.vue)**
 - **[Migration Guide](https://vue-dynamic-forms.alvarosaburido.dev/guide/migration-guide.html)**