[feature] command for measuring type annotation coverage (pyrefly report)

[yangdanny97]

Something like pyright's --verifytypes or mypy's --report. The latter generates XML/HTML coverage reports

https://mypy.readthedocs.io/en/stable/config_file.html#report-generation

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[maggiemoss]

Still working on this!

[github-actions]

This issue has someone assigned, but has not had recent activity for more than 2 weeks.

If you are still working on this issue, please add a comment so everyone knows. Otherwise, please unassign yourself and allow someone else to take over.

Thank you for your contributions!

[github-actions]

This issue has someone assigned, but has not had recent activity for more than 2 weeks.

If you are still working on this issue, please add a comment so everyone knows. Otherwise, please unassign yourself and allow someone else to take over.

Thank you for your contributions!