Add an option to delete branches with closed status

[seachicken]

Resolves #119
#127

Add --state (closed|merged) option. More branches to clean up ✨

[codecov]

Codecov Report

Attention: Patch coverage is 57.57576% with 14 lines in your changes missing coverage. Please review.

Project coverage is 81.23%. Comparing base (95dae5f) to head (d20a3d3).

Files with missing lines	Patch %	Lines
main.go	30.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
- Coverage   82.11%   81.23%   -0.89%     
==========================================
  Files           7        7              
  Lines         984     1007      +23     
==========================================
+ Hits          808      818      +10     
- Misses        146      159      +13     
  Partials       30       30              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests