Move router out of framework and into a first-party module.

mod.ts

@@ -14,11 +14,4 @@ export type { Error } from "./src/error/interfaces/error.ts";
 export type { Context } from "./src/http/interfaces/context.ts";
 export type { Middleware } from "./src/http/interfaces/middleware.ts";
 
-export {
-  BadRequest,
-  Kernel,
-  NotFound,
-  Request,
-  Response,
-  ServerError,
-};
+export { BadRequest, Kernel, NotFound, Request, Response, ServerError };