Add roadmap management, service worker, and user invitation features

- Implemented roadmap.php for managing roadmap items with filtering options by quarter and status.
- Added a service worker (sw.js) to handle push notifications and click events for calendar appointments.
- Created users.php for admin to manage team members and invitations, including user creation and deletion functionalities.

composer.json

@@ -0,0 +1,9 @@
+{
+    "require": {
+        "php": "^8.2",
+        "ext-pdo": "*",
+        "ext-pdo_mysql": "*",
+        "ext-mysqli": "*"
+    }
+}
+