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

api/users/read.php

@@ -0,0 +1,31 @@
+<?php
+header('Content-Type: application/json; charset=UTF-8');
+require_once '../auth_helper.php';
+requireAdmin();
+require_once '../db_connect.php';
+
+$sql = "SELECT u.id, u.username, u.role, u.ibadah_id, ri.nama as nama_ibadah 
+        FROM users u 
+        LEFT JOIN rumah_ibadah ri ON u.ibadah_id = ri.id 
+        ORDER BY u.id DESC";
+
+$result = $conn->query($sql);
+$arr = array();
+
+if ($result && $result->num_rows > 0) {
+    while ($row = $result->fetch_assoc()) {
+        $item = array(
+            "id" => intval($row['id']),
+            "username" => $row['username'],
+            "role" => $row['role'],
+            "ibadah_id" => $row['ibadah_id'] ? intval($row['ibadah_id']) : null,
+            "nama_ibadah" => $row['nama_ibadah'] ?? '-'
+        );
+        array_push($arr, $item);
+    }
+    echo json_encode(["status" => "success", "data" => $arr]);
+} else {
+    echo json_encode(["status" => "success", "data" => []]);
+}
+$conn->close();
+?>