feat: qidlevisible event / 'idle-visible' vistask strategy

[wmertens]

This makes Link's q-data prefetching less eager, so it doesn't interfere with LCP

[changeset-bot]

🦋 Changeset detected

Latest commit: cdb40db

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

This PR includes changesets to release 4 packages

Name	Type
@builder.io/qwik-city	Minor
@builder.io/qwik	Minor
eslint-plugin-qwik	Minor
create-qwik	Minor

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commit: cdb40db

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[Varixo]

Shouldn't be QwikIdleVisibleEvent?

[maiieul]

Before merging this new strategy/API we need to make sure that VisibleTaskStrategy = "intersection-observer" can indeed be fired during LCP and therefore slow down LCP.

As discussed it's currently not the case (see screenshot) but might be in the future if we tweak things a little.

core is loaded after LCP, and we need core to execute a visible task

[wmertens]

converted to draft, we may not need this strategy