feat: better destructuring assignments

[Rich-Harris]

Noticed that we're transforming destructuring assignments even if all the identifiers are normal bindings. This fixes it

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[changeset-bot]

🦋 Changeset detected

Latest commit: edc3e63

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

This PR includes changesets to release 1 package

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svelte	Patch

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