refactor: use markdown layouts

src/pages/projects/[slug].astro

@@ -1,6 +1,5 @@
 ---
 import { getCollection } from "astro:content";
-import Post from "@layouts/Post.astro";
 import { getLocale } from "astro-i18n-aut";
 import { filterCollection, parseSlug } from "@i18n/utils";
 
@@ -32,6 +31,4 @@ if (!page) {
 const { Content } = await page.render();
 ---
 
-<Post {...page} backlink="/projects">
-  <Content />
-</Post>
+<Content />