chore(deps): update dependency unbuild to v3

Author: renovate[bot]

package.json

@@ -86,7 +86,7 @@
     "nuxt": "^3.14.1592",
     "playwright": "^1.49.0",
     "typescript": "^5.6.3",
-    "unbuild": "^2.0.0",
+    "unbuild": "^3.0.0",
     "vitepress": "^1.5.0",
     "vitepress-plugin-mermaid": "^2.0.17",
     "vitest": "^2.1.5",