Initial Commit with ENVs, directory structures, cursor rules, etc

includes/db.php

@@ -0,0 +1,23 @@
+<?php
+
+function readJsonFile($filename) {
+    $filepath = __DIR__ . '/../data/' . $filename;
+    if (!file_exists($filepath)) {
+        return [];
+    }
+    $content = file_get_contents($filepath);
+    return json_decode($content, true) ?? [];
+}
+
+function writeJsonFile($filename, $data) {
+    $filepath = __DIR__ . '/../data/' . $filename;
+    $json = json_encode($data, JSON_PRETTY_PRINT);
+    return file_put_contents($filepath, $json);
+}
+
+function ensureDataDirectory() {
+    $dataDir = __DIR__ . '/../data';
+    if (!file_exists($dataDir)) {
+        mkdir($dataDir, 0755, true);
+    }
+}