GG.deals clone: CodeIgniter 4 + MongoDB game price tracker

- Full gg.deals-style UI: deal feed with filters, game pages with price
  history charts, rankings, vouchers, news, prepaids, subscriptions,
  bundles, franchises, wishlist, API docs
- Real data crawlers:
  * gg:crawl (Steam Store API + GOG Catalog + Epic free games)
  * gg:catalog (252K game slugs from gg.deals sitemaps)
  * gg:ggdeals (per-game prices via FlareSolverr session, JSON-LD parsing)
  * gg:seed / gg:crawl-covers (demo seed + Steam CDN cover art)
- 24/7 self-updating scheduler (scripts/scheduler_loop.php, lockfile-protected)
- Tailwind v4 dark/light theme, Alpine.js, Chart.js

app/Common.php

@@ -0,0 +1,15 @@
+<?php
+
+/**
+ * The goal of this file is to allow developers a location
+ * where they can overwrite core procedural functions and
+ * replace them with their own. This file is loaded during
+ * the bootstrap process and is called during the framework's
+ * execution.
+ *
+ * This can be looked at as a `master helper` file that is
+ * loaded early on, and may also contain additional functions
+ * that you'd like to use throughout your entire application
+ *
+ * @see: https://codeigniter.com/user_guide/extending/common.html
+ */