chore(deps): update dependency tsdown to ^0.18.0

Author: renovate[bot]

package.json

@@ -49,7 +49,7 @@
     "@types/node": "^22.10.2",
     "monaco-editor": "^0.33.0",
     "rimraf": "^6.0.1",
-    "tsdown": "^0.16.6",
+    "tsdown": "^0.18.0",
     "typescript": "^5.6.3",
     "vite": "^5.4.11",
     "vite-plugin-monaco-editor": "^1.1.0"