Breaking change: Deprecation and discontinuation of standalone Dart tools

[NewsBot]

A new Dart blog post/announcement has been posted!

Background Historically the Dart team has offered a number of smaller developer tools for things like formatting code (dartfmt), analyzing code (dartanalyzer), etc. In Dart 2.10 (October 2020) we introduced a new unified Dart developer tool, the dart tool. Intended change As we discussed at

Get the full details here: https://groups.google.com/a/dartlang.org/d/msg/announce/3LkLWpzHjHM/HxUwINPYBgAJ