fix: prevent bundling @vitest/browser/context

Author: AriPerkkio

package.json

@@ -48,6 +48,7 @@
     "@webcontainer/api": "^1.5.3"
   },
   "peerDependencies": {
+    "@vitest/browser": "^3.1",
     "vitest": "^3.1"
   },
   "devDependencies": {