feat: implement full authentication system and CRUD APIs for users, rumah ibadah, and penduduk miskin with database updates.

api/check_session.php

@@ -0,0 +1,27 @@
+<?php
+header('Content-Type: application/json; charset=UTF-8');
+
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
+if (isset($_SESSION['user_id'])) {
+    echo json_encode([
+        'status' => 'success',
+        'isLoggedIn' => true,
+        'data' => [
+            'id' => intval($_SESSION['user_id']),
+            'username' => $_SESSION['username'],
+            'role' => $_SESSION['role'],
+            'ibadah_id' => $_SESSION['ibadah_id'] ? intval($_SESSION['ibadah_id']) : null,
+            'nama_ibadah' => $_SESSION['nama_ibadah'] ?? null
+        ]
+    ]);
+} else {
+    echo json_encode([
+        'status' => 'success',
+        'isLoggedIn' => false,
+        'data' => null
+    ]);
+}
+?>