What libraries or packages should be used?

If we need to include external libraries in the template, what kind of libraries should be considered? Should the template try to stick to only what the Flutter and Dart provide, with extension points to community packages? Should the template make use of community packages to demonstrate best practices?

- Only Flutter/Dart team libraries
- Flutter Favorites

Read the issue body and its 11-comment discussion first; no file, test, or entry point is identified. Resolve whether the template should use only Flutter/Dart libraries or also Flutter Favorites, then document the chosen dependency policy and its extension points.

Written by the indexing model from the issue text.