added new app-react library with AppRootWrapperBlueprint replacement

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/frontend-plugin-api/report.api.md

@@ -271,7 +271,7 @@ export const AppRootElementBlueprint: ExtensionBlueprint_2<{
   dataRefs: never;
 }>;
 
-// @public
+// @public @deprecated
 export const AppRootWrapperBlueprint: ExtensionBlueprint_2<{
   kind: 'app-root-wrapper';
   params: {

packages/frontend-plugin-api/src/blueprints/AppRootWrapperBlueprint.tsx

@@ -27,6 +27,10 @@ const componentDataRef = createExtensionDataRef<
  * and similar.
  *
  * @public
+ * @deprecated Use {@link PluginWrapperBlueprint} instead if you want to wrap
+ * all plugin components in the same wrapper. If you want to wrap the entire
+ * app, use the `AppRootWrapperBlueprint` from `@backstage/plugin-app-react`
+ * instead, although note that only app modules are able to use that blueprint.
  */
 export const AppRootWrapperBlueprint = createExtensionBlueprint({
   kind: 'app-root-wrapper',