Merge pull request #20535 from backstage/mob/external-routes

frontend-*-api: add support for route bindings

plugins/tech-radar/alpha-api-report.md

@@ -3,11 +3,13 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { AnyExternalRoutes } from '@backstage/core-plugin-api';
+import { AnyRoutes } from '@backstage/core-plugin-api';
 import { BackstagePlugin } from '@backstage/frontend-plugin-api';
 import { Extension } from '@backstage/frontend-plugin-api';
 
 // @alpha (undocumented)
-const _default: BackstagePlugin;
+const _default: BackstagePlugin<AnyRoutes, AnyExternalRoutes>;
 export default _default;
 
 // @alpha (undocumented)