added req and res object to context return

[phaxz10]

Snippet

return {
             req,
             res,
             ...userProvidedContext,
             resolveNestDependency,
        };

also added the ability to define types for Req and Res object

export type InferContextType<TContext, TReq = IncomingMessage, TRes = ServerResponse> =
  TContext extends () => any
    ? inferAsyncReturnType<TContext> & NestResolver<TReq, TRes>
    : NestResolver<TReq, TRes>;