Verify if we support `vue-router` v5

### Problem Statement

Based on [the docs](https://docs.sentry.io/platforms/javascript/guides/vue/features/vue-router/) we support `vue-router` v2-v4, but v5 is out since January 2026: https://npmx.dev/package/vue-router/v/5.0.0

### Solution Brainstorm

Maybe we just have to add an E2E test and we're done.

### Additional Context

_No response_

### Priority

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Start with the Vue integration documentation, which currently lists vue-router v2–v4, and inspect the existing Vue router E2E coverage. Verify whether vue-router v5 works with the SDK, add the requested E2E coverage if needed, and update the documented supported versions when the test passes.

Written by the indexing model from the issue text.