add content pages & md suport

svelte.config.js

@@ -1,10 +1,11 @@
 import adapter from '@sveltejs/adapter-auto';
+import { sveltePreprocess } from 'svelte-preprocess';
 import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
   kit: {
     adapter: adapter()
   },
-  preprocess: vitePreprocess()
+  preprocess: [vitePreprocess(), sveltePreprocess({})]
 };
 export default config;