Add fetchpriority option for link + Fix prefetch url in dev mode

[GrandSchtroumpf]

What is it?

• Feature / enhancement
• Bug
• Docs / tests / types / typos
• Infra

Description

prefetch strategy linkInsert always has fetchpriority set to "auto" which might result into busying the browser at load time. With linkFetchPriority we can set the bundle prefetch to "low" to give an indication to the browser.

Checklist:

• My code follows the developer guidelines of this project
• I have performed a self-review of my own code
• I have ran pnpm change and documented my changes
• I have made corresponding changes to the Qwik docs
• Added new tests to cover the fix / functionality -> no existing test infra for this par for the code

[changeset-bot]

🦋 Changeset detected

Latest commit: be9d7a2

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	Patch
eslint-plugin-qwik	Patch
@builder.io/qwik-city	Patch
create-qwik	Patch

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[wmertens]

[wmertens]

LGTM!

[wmertens]