Better documentation on action/view definitions and their impact on IDE introspection, navigation and refactoring about mobx-state-tree

[coolsoftwaretyler]

Thanks @beepsoft! I know we have a call scheduled, so we can talk in-depth then. But just want to acknowledge we'll work on this.

I think I'd like to add a "Recipes" section to the website in the sidebar for things like this.

Would love to see a PR with a markdown file presenting these options and code examples, along with tradeoffs for each, and a recommendation.

[constgen]

Just one more workaround

const M = types
  .model('MyModel', {})
  .actions(self => ({
      action1(){}
  }))
  .actions(self => ({
      action2(){}
  }))

Every action in a separate actions declaration also fixes Go To Definition