chore: establish planning workflow and add initial feature plans

[dnim]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.97%. Comparing base (d3ea232) to head (7a92128).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #24   +/-   ##
=======================================
  Coverage   77.97%   77.97%           
=======================================
  Files           8        8           
  Lines         622      622           
  Branches      165      165           
=======================================
  Hits          485      485           
  Misses        137      137           

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