feat: delay emptying dist folder in svelte-package

[kwangure]

Fixes #10507

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🦋 Changeset detected

Latest commit: 972fbbb

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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@sveltejs/package	Patch

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[ARed99]

proceed

[benmccann]

lgtm other than a minor suggestion on the changeset