Router and AutoRouter Request types are not same

[istarkov]

Describe the Issue

It would be beneficial to have consistent Router types for the request.

Currently, we have the following types for Router and AutoRouter:

export const Router = <
  RequestType = IRequest,
  Args extends any[] = any[],
  ResponseType = any
>(

export const AutoRouter = <
  RequestType extends IRequest = IRequest,
  Args extends any[] = any[],
  ResponseType = any
>({

The difference is that AutoRouter and IttyRouter require RequestType to be a subtype of IRequest, while Router does not.