Extend prefetch() API

[LankyMoose]

Description

It would be really great if the prefetch() API could return the data from the fetched route. For example, I'd like to get some context / meta data from the hovered link in order to show some kind of a preview.

[brillout]

Although I agree that'd be nice, I ain't sure how much of a priority this should be for the Vike team.

That said, you can increase the priority by:

• Further elaborating your use case. (The more we can see how much added value it adds, the higher we'll increase its priority.)
• Creating a PR. (For example, if your PR showcases that supporting your use case is easy to implement, then we'll merge it. That said, keep in mind that we may reject your PR if reviewing it would take too much time.)
• Does any React/Vue/Solid framework out there support your use case? If yes that also increases the priority.
• Sponsoring Vike

I'm closing this ticket but let's re-open once we increase its priority.