Convert changelog to TGUI (#58593)

This pull request converts the changelog to TGUI. 
Note: Old unused changelog files will be automatically removed on the next changelog run
Why It's Good For The Game

More consistent UI, ability to view all historic logs.
Changelog

cl Celotajs
refactor: Converted the changelog popup to TGUI
/cl

tools/WebhookProcessor/github_webhook_processor.php

@@ -737,9 +737,6 @@ function checkchangelog($payload, $compile = true) {
 					$currentchangelogblock[] = array('type' => 'balance', 'body' => $item);
 				}
 				break;
-			case 'tgs':
-				$currentchangelogblock[] = array('type' => 'tgs', 'body' => $item);
-				break;
 			case 'code_imp':
 			case 'code':
 				if($item != 'changed some code'){