Create more documentation (#7627)

* Documentation, format class, no modification.

app/system/resources/functions/system_information.php

@@ -83,6 +83,14 @@
 	//
 
 //system information
+	/**
+	 * Retrieves system information.
+	 *
+	 * @return array An array containing various system information such as PHP and switch versions,
+	 *               git repository details, operating system name, version, uptime, kernel, and type,
+	 *               memory usage, CPU usage, and disk space. The keys of the returned array are
+	 *               'version', 'git', 'path', 'switch', 'php', 'os', 'mem', and 'cpu'.
+	 */
 	function system_information(): array {
 		global $database, $db_type;
 		$system_information = [];