Document Flutter & Dart code snippets early in the Getting Started section

[khanhnwin]

What information needs to be added?

Dart & Flutter code snippets that are available in IDEs makes it easier to auto fill large chunks of templated code (stateless/stateful widget definitions/if/try-catch/etc.) by typing out short prefixes: https://github.com/Dart-Code/Dart-Code/tree/master/snippets

Where should this new content appear?

In the Getting Started docs, even before FWE. This should appear "as soon as you open your IDE" part.

I would like to fix this problem.

• I will try and fix this problem on docs.flutter.dev.