chore(deps): update dependency unbuild to v3

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
     "tsx": "^4.19.0",
     "typescript": "^5.6.2",
     "typescript-eslint": "^8.6.0",
-    "unbuild": "^2.0.0",
+    "unbuild": "^3.0.0",
     "vitest": "^2.1.0",
     "vue": "^3.2.45"
   },