fix: deeply unstate objects passed to inspect

[dummdidumm]

When doing $inspect({ x, y }), both x and y are now unstated if they are signals, compared to before where unstate was only called on the top level object, leaving the proxies in place which results in a worse debugging experience. Also improved typings which makes it easier to find related code paths.

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🦋 Changeset detected

Latest commit: e33da20

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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