fix: Bring back DocumentProps and LayoutProps in rwsdk/router

We accidentally stopped exporting these types in #815

Author: justinvdm

sdk/src/runtime/entries/router.ts

@@ -1,3 +1,4 @@
 import "./types/shared";
 export * from "../lib/links";
 export * from "../lib/router";
+export type { DocumentProps, LayoutProps } from "../lib/types";