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/script_data.php

@@ -1,5 +1,15 @@
 <?php
-function generateScriptData($phpArray):string {
+/**
+ * Generates a JavaScript script tag containing commands to store PHP array key-value pairs in local storage.
+ * This function is designed to translate PHP associative array data into JavaScript local storage items.
+ * It ensures that the array is associative and single-level before proceeding with the JavaScript code generation.
+ * This is used when dumping session data into local storage for use by the client script.
+ *
+ * @param array $phpArray The associative array whose data will be converted into JavaScript local storage setItem calls.
+ * @return string Returns a script tag with JavaScript code. If the input is not a valid single-level associative array,
+ *                it returns a script with an error logged to the console.
+ */
+function generateScriptData(array $phpArray):string {
     // Check if the array is associative and single-level
     if (is_array($phpArray) && count($phpArray) > 0 && count(array_filter(array_keys($phpArray), 'is_string')) === count($phpArray)) {
         // Generate JavaScript code to save each array element to local storage