chore: added start:with-theme npm script (#378)

Author: PKulkoRaccoonGang

package.json

@@ -12,6 +12,7 @@
     "lint": "fedx-scripts eslint --ext .js --ext .jsx .",
     "snapshot": "fedx-scripts jest --updateSnapshot",
     "start": "fedx-scripts webpack-dev-server --progress",
+    "start:with-theme": "paragon install-theme && npm start && npm install",
     "test": "fedx-scripts jest --coverage"
   },
   "files": [