feat(get-sorted-posts): use velite Post as post type

src/lib/get-sorted-posts.ts

@@ -1,7 +1,5 @@
-import { Post } from 'contentlayer/generated'
+import { Post } from '#content'
 
 export function getSortedPosts(posts: Post[]) {
-  return posts.sort(
-    (a, b) => Number(new Date(b.date)) - Number(new Date(a.date))
-  )
+  return posts.sort((a, b) => Number(b.date) - Number(a.date))
 }