fix(signals): computedSignal QRL handling

[wmertens]

makes computed signals work and enforces that the calculation doesn't return a Promise (also via types)

[changeset-bot]

🦋 Changeset detected

Latest commit: eae2ed8

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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commit: eae2ed8

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