feat: accept URL in redirect

[GauBen]

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Tiny update to redirect to allow passing URL objects as is:

const location = new URL(`https://${site}/route`);
location.searchParams.set('param1', env.PUBLIC_THING);

throw redirect(307, location); // instead of location.href

[changeset-bot]

🦋 Changeset detected

Latest commit: 389193c

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

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Minor

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