[docs] revamp the todolist in the readme

[lrnv]

Fixes #56

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.12%. Comparing base (5d3d859) to head (b172c5a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   92.12%   92.12%           
=======================================
  Files          12       12           
  Lines         978      978           
=======================================
  Hits          901      901           
  Misses         77       77           

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