Use typescript for astro config

Author: morr0ne

astro.config.mjs renamed to astro.config.ts

@@ -1,5 +1,4 @@
-// @ts-check
-import { defineConfig } from 'astro/config';
+import { defineConfig } from "astro/config";
 
 // https://astro.build/config
 export default defineConfig({});