Document page.error and page.status and ensure exposed to __layout #3285
Description
Describe the problem
error and status were added to the page store in #3096, but not documented yet. It's also not clear that they're available in __layout yet
Describe the proposed solution
Add to https://kit.svelte.dev/docs#modules-$app-stores
Alternatives considered
No response
Importance
nice to have
Additional Information
No response