chore: remove unused components, utilities, and dependencies

- Removed unused components (`components.vue`, `Markup.vue`, `index.vue`, etc.) and related styles.
- Deleted obsolete utilities (`api.ts`, `componentCatalog.ts`).
- Cleared out dependencies in `package-lock.json` related to unused functionalities.

postcss.config.cjs

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}