feat(router): add configurable link prefetch data strategies

[Varixo]

This PR adds configuration for prefetch data strategies for Link component.
You can choose between:

• viewport to prefetch when the link becomes visible
• hover to prefetch on mouse hover for fine pointers
• focus to prefetch when the link receives keyboard focus
• pointerdown to prefetch as soon as the user presses the link

The configuration is independent for coarse and fine pointers.

This can be set globally by setting option

linkDataPrefetch?: {
  coarsePointer?: ('viewport' | 'focus' | 'pointerdown')[];
  finePointer?: ('viewport' | 'hover' | 'focus' | 'pointerdown')[];
};

in qwikRouter vite plugin.
This can be also configured for any Link component.

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Latest commit: 099cf29

The changes in this PR will be included in the next version bump.

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commit: 099cf29

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