Revert the Context back to Record-based

[ゆきくらげ]

I've actually used it in jelly-docs...

class-based

component :: RouterContext c => ApisContext c => Component c

record-based

component :: forall c. Component (RouterContext + Apis Context + c)

It doesn't change that much, and in fact, the record base seems to have less overhead, so I'll put it back.

[ゆきくらげ]

8252fd5