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.

index.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * Fociz Entrypoint
+ */
+
+require_once __DIR__ . '/includes/auth.php';
+start_secure_session();
+
+if (!has_admin_user()) {
+    header('Location: /auth/setup.php');
+    exit;
+}
+
+$user = get_logged_in_user();
+if ($user) {
+    header('Location: /planner.php');
+    exit;
+}
+
+header('Location: /auth/login.php');
+exit;
+