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]>

package.json

@@ -13,6 +13,7 @@
     "dependencies": {
         "@moduletrace/bun-mariadb": "^1.1.1",
         "@moduletrace/bunext": "^1.2.4",
+        "@moduletrace/twui": "^0.1.8",
         "gray-matter": "^4.0.3",
         "gsap": "^3.15.0",
         "html-to-react": "^1.7.0",