core-api: add back MutableRouteRef for backwards compatibility and export AbsoluteRouteRef

packages/core-api/src/routing/RouteRef.ts

@@ -84,3 +84,8 @@ export class AbsoluteRouteRef implements ConcreteRoute {
 export function createRouteRef(config: RouteRefConfig): AbsoluteRouteRef {
   return new AbsoluteRouteRef(config);
 }
+
+// TODO(Rugvip): Added for backwards compatibility, remove once old usage is gone
+// We may want to avoid exporting the AbsoluteRouteRef itself though, and consider
+// a different model for how to create sub routes, just avoid this
+export type MutableRouteRef = AbsoluteRouteRef;

packages/core-api/src/routing/index.ts

@@ -15,4 +15,5 @@
  */
 
 export type { RouteRef, RouteRefConfig, ConcreteRoute } from './types';
+export type { MutableRouteRef, AbsoluteRouteRef } from './RouteRef';
 export { createRouteRef } from './RouteRef';