frontend-plugin-api: move app blueprints to new app-react package

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

plugins/app/package.json

@@ -7,7 +7,8 @@
     "pluginPackages": [
       "@backstage/plugin-app",
       "@backstage/plugin-app-backend",
-      "@backstage/plugin-app-node"
+      "@backstage/plugin-app-node",
+      "@backstage/plugin-app-react"
     ]
   },
   "publishConfig": {
@@ -54,6 +55,7 @@
     "@backstage/core-plugin-api": "workspace:^",
     "@backstage/frontend-plugin-api": "workspace:^",
     "@backstage/integration-react": "workspace:^",
+    "@backstage/plugin-app-react": "workspace:^",
     "@backstage/plugin-permission-react": "workspace:^",
     "@backstage/theme": "workspace:^",
     "@backstage/types": "workspace:^",