Branch Coverage reporting and threshold support

[AmritD]

Problem statement

We use SimpleCov for code coverage reporting. It already supports branch coverage reporting and we have it turned ON. Qlty however does not report this number and does not allow us to set the threshold for total and diff branch coverage.

Simplecov link: https://github.com/simplecov-ruby/simplecov?tab=readme-ov-file#branch-coverage-ruby--25

Solution brainstorm (optional)

Report SimpleCov total coverage and diff coverage numbers and allow customers to set a threshold so that PRs will fail if they don't meet the threshold.