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/endpoint.php

@@ -1,6 +1,16 @@
 <?php
-
-function runEndpoint($endpoint_file): ?array
+/**
+ * Executes an endpoint script and returns the results.
+ *
+ * This function includes an endpoint PHP file that defines a function named `endpoint` which
+ * is expected to accept an array parameter and return an array result.
+ * It simply scopes an external file into a function to prevent variable conflicts.
+ *
+ * @param string $endpoint_file The path to the endpoint PHP file.
+ * @return array|null Returns the result of the endpoint function if successful, or null if the
+ *                     endpoint function or file does not behave as expected.
+ */
+function runEndpoint(string $endpoint_file): ?array
 {
 
     $endpoint_data = $_POST;
@@ -9,8 +19,20 @@ function runEndpoint($endpoint_file): ?array
     return endpoint($endpoint_data);
 }
 
-
-function getEndpoint($endpoint_name): string
+/**
+ * Retrieves and processes the output of a specified endpoint.
+ *
+ * This function determines the appropriate endpoint PHP file based on the provided endpoint name,
+ * executes the endpoint, and returns its results as a JSON-encoded string. It handles and
+ * translates different return types into a JSON format and manages HTTP response codes based on
+ * success or failure of the endpoint execution.
+ *
+ * @param string $endpoint_name The name of the endpoint, which is used to construct the file path to the endpoint script.
+ * @return string A JSON-encoded string representing the result of the endpoint, including a status indicator and any relevant data or error messages.
+ *@global array $routerRequest Current request data that might influence the endpoint processing.
+ * @global array $routerConfig Global configuration that contains paths and settings.
+ */
+function getEndpoint(string $endpoint_name): string
 {
     $output = array();
     $output["Status"] = "Fail";