Replace vendored twui library with @moduletrace/twui package

- Import all twui layout/elements components and base.css from the
  @moduletrace/twui package instead of src/components/lib
- Move the site's own motion and three modules out of the old lib
  folder into src/components/motion and src/components/three
- Delete the vendored src/components/lib folder and its tsconfig excludes
- Type BlogPostsListCard's post prop with the DB blog post type,
  fixing the type error in BlogPostsList

Co-Authored-By: Claude Opus 5.5 <[email protected]>

tsconfig.json

@@ -20,9 +20,6 @@
     "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
     "exclude": [
         "node_modules",
-        ".bunext",
-        "src/components/lib/elements/RemoteCodeBlock.tsx",
-        "src/components/lib/mdx",
-        "src/components/lib/next-js"
+        ".bunext"
     ]
 }