chore(tsdown): remove unbuild leftovers

package.json

@@ -68,6 +68,7 @@
     "@changesets/changelog-github": "catalog:",
     "@changesets/cli": "catalog:",
     "@playwright/test": "catalog:",
+    "@tsdown/css": "catalog:",
     "@types/node": "catalog:",
     "@vben/commitlint-config": "workspace:*",
     "@vben/eslint-config": "workspace:*",
@@ -95,7 +96,6 @@
     "tsdown": "catalog:",
     "turbo": "catalog:",
     "typescript": "catalog:",
-    "unbuild": "catalog:",
     "unplugin-vue": "catalog:",
     "vite": "catalog:",
     "vitest": "catalog:",