message: packages/cli: added some development docs to the readme
diff: @@ -16,6 +16,16 @@ or
  $ yarn add @backstage/cli
  ```
  +## Development
  +
  +For local development the cli can be used directly, even from other packages in this repo. The `bin/backstage-cli` entrypoint contains a switch that will load the implementation from the `src` directory when executed inside this repo.
  +
  +To try out the `create-app` command locally, you can execute the following from the parent directory of this repo:
  +
  +```bash
  +./backstage/packages/cli/bin/backstage-cli create-app
  +```
  +
  ## Documentation
  - [Backstage Readme](https://github.com/spotify/backstage/blob/master/README.md)
  