Add additional docs

Signed-off-by: Dominik Henneke <dominik.henneke@sda-se.com>

plugins/catalog-react/api-report.md

@@ -761,17 +761,13 @@ export interface StarredEntitiesApi {
   toggleStarred(entityRef: string): Promise<void>;
 }
 
-// Warning: (ae-missing-release-tag) "StarredEntitiesApiObservable" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
-//
 // @public (undocumented)
 export type StarredEntitiesApiObservable = {
   starredEntities: Set<string>;
   isStarred: (entityRef: string) => boolean;
 };
 
-// Warning: (ae-missing-release-tag) "starredEntitiesApiRef" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
-//
-// @public (undocumented)
+// @public
 export const starredEntitiesApiRef: ApiRef<StarredEntitiesApi>;
 
 // Warning: (ae-forgotten-export) The symbol "Props" needs to be exported by the entry point index.d.ts

plugins/catalog-react/src/apis/StarredEntitiesApi/StarredEntitiesApi.ts

@@ -16,10 +16,18 @@
 
 import { ApiRef, createApiRef, Observable } from '@backstage/core-plugin-api';
 
+/**
+ * An API to store starred entities
+ *
+ * @public
+ */
 export const starredEntitiesApiRef: ApiRef<StarredEntitiesApi> = createApiRef({
   id: 'catalog-react.starred-entities',
 });
 
+/**
+ * @public
+ */
 export type StarredEntitiesApiObservable = {
   /**
    * A set of entity references that are starred