Add initial plan to implement FROST KeyGen

[pool2win]

We will use BFT broadcast to provide agreement on hashes of secret shares.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.14%. Comparing base (4db8b24) to head (6b21d30).
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #17   +/-   ##
=======================================
  Coverage   87.14%   87.14%           
=======================================
  Files          14       14           
  Lines        1727     1727           
=======================================
  Hits         1505     1505           
  Misses        222      222           

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