message: packages/cli: update plugin template README to explain next steps and plugin:serve
diff: -# Title
  +# {{id}}
  +
  Welcome to the {{id}} plugin!
  -## Sub-section 1
  +_This plugin was created through the Backstage CLI_
  +
  +## Getting started
  +
  +Your plugin has been added to the example app in this repository, meaning you'll be able to access it by running `yarn start` in the root directory, and then navigating to [/{{id}}](http://localhost:3000/{{id}}).
  -## Sub-section 2
  +You can also serve the plugin in isolation by running `yarn start` in the plugin directory.
  +This method of serving the plugin provides quicker iteration speed and a faster startup and hot reloads.
  +It is only meant for local development, and the setup for it can be found inside the [/dev](/dev) directory.
  