feat: Add FaceAI integration with handoff and return functionality

- Introduced a new workspace for FaceAI in package.json.
- Implemented FaceAI handoff logic in faceai_handoff.php, including identity verification and token signing.
- Created faceai_return.php to handle return requests from FaceAI, validating tokens and forwarding results.
- Developed faceai_simulator.php and faceai_simulator_view.php for simulating the FaceAI interface with demo photos.
- Enhanced rus-ecom-240621.js to support new FaceAI features, including dynamic URL building and button integration.
- Added faceai_config.php for configuration management, including environment variable handling and utility functions.
- Updated HTML structure and styles in simulator view for better user experience.

faceai/apps/frontend/src/router.js

@@ -0,0 +1,17 @@
+import { createRouter, createWebHistory } from 'vue-router';
+import HomeView from './views/HomeView.vue';
+import HandoffCallbackView from './views/HandoffCallbackView.vue';
+
+export default createRouter({
+  history: createWebHistory(),
+  routes: [
+    {
+      path: '/',
+      component: HomeView
+    },
+    {
+      path: '/auth/callback',
+      component: HandoffCallbackView
+    }
+  ]
+});