fix: fix RecursiveFormFields type for recursive or unknown schemas

[sillvva]

fixes #14687

Right now, if the schema is unknown or otherwise indefinitely recursive, it treats form.fields as a field leaf instead of a field container. This makes form.fields.as() incorrectly available instead of form.fields.allIssues(). This update fixes that by ensuring form.fields is always treated as a field container.

It also exports the RemoteFormFields type so that it can be used to create wrapper components.

Examples

Pretend the function is a generic component

Before Fix

After Fix

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[changeset-bot]

🦋 Changeset detected

Latest commit: 2f955c6

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/kit	Patch

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-14689-svelte.vercel.app/

[sillvva]

Closed in favor of #14734