convert wetty from submodule to normal directory

wetty/src/server/socketServer/assets.ts

@@ -0,0 +1,5 @@
+import serve from 'serve-static';
+import { assetsPath } from './shared/path.js';
+
+export const trim = (str: string): string => str.replace(/\/*$/, '');
+export const serveStatic = (path: string) => serve(assetsPath(path));