Metric collection for Dart ecosystem

[sachin-sandhu]

What are you trying to accomplish?

Adds metric collection for Dart language ecosystem along with pub package manager

Anything you want to highlight for special attention from reviewers?

How will you know you've accomplished your goal?

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[markhallen]

TIL; typed: strong - Banning untyped from a file · Sorbet.

👍