feat: integrate backlog.md into the project

[dnim]

https://github.com/MrLesk/Backlog.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.30%. Comparing base (96307be) to head (da0b02a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #44   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          12       12           
  Lines        1064     1064           
  Branches      259      271   +12     
=======================================
  Hits         1046     1046           
  Misses         18       18           

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