feat(vue): Export Vue exception capture helper

[vansh-nagar]

Exports captureVueException from @sentry/vue together with its ViewModel type. The helper applies the same component metadata and mechanism data as the automatic Vue handler, but captures synchronously so an onErrorCaptured boundary can call it inside withScope without losing per-error scope data across a timer.

The automatic application handler still defers capture to the next event loop and now shares the metadata-building path with the public helper.

Validated with the focused 14-test Vue error-handler suite, the Vue dependency-aware type build, and type-aware package lint.

Fixes #11471

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

Want reviews to match your repository better? Bugbot Learning can learn team-specific rules from PR activity. A team admin can enable Learning in the Cursor dashboard.

^{Reviewed by Cursor Bugbot for commit f52f52b. Configure here.}

[github-actions]

👋 @nicohrubec, @s1gr1d — Please review this PR when you get a chance!

[Lms24]

hey @vansh-nagar thanks for opening this PR! do you need this new helper yourself, or did you pick up the issue because it was still open?

[vansh-nagar]

Thanks for checking. I picked this up because the issue was still open; I do not currently need the helper in my own project. If the use case is no longer something you want to support, I am happy to close it. Otherwise I can adjust the implementation to match the API you would prefer.

[vansh-nagar]

I picked it up because the issue was still open; I do not need the helper for a private project. I verified the requested public export and tests against the current codebase. If the API direction has changed since the issue was opened, I am happy to adjust the PR.