Add PHPDocs generated by ChatGPT,

add additional clarification to some functions,
add addNewsComment function and API, currently untested and not implemented in the client,
fix a bunch of stuff that PHPStorm pointed out

lib/router.php

@@ -1,6 +1,14 @@
 <?php
 
-
+/**
+ * Initializes the routing system for a web application. This function processes the incoming
+ * URL and determines the site name and page name based on the configuration and the URL structure.
+ * It handles default configurations and supports different types of requests like API or page requests.
+ *
+ * @global array $routerConfig The global configuration array that includes default site and page settings.
+ * @return array Returns an associative array containing the routing information, including the site name,
+ *               page name, request type, and parsed request address from the HTTP host.
+ */
 function initRouter(): array
 {
     global $routerConfig;