feat: make error component styling easier

[John Vandivier]

as a developer, I'd like to more easily configure the ErrorComponent style, so that it doesn't follow 100vh and I can otherwise tailor it to my theme

tech solution options:

1. ErrorComponent takes a style attribute that is propagated down
2. ErrorComponent uses global styles instead of a style attribute

we should update the docs also with this:
https://blitzjs.com/docs/error-handling#built-in-errors