feat: add CancellationDetails to Offering

[ethan-tbd]

this pr adds CancellationDetails to the Offering message

[github-actions]

TBD Spec Test Vectors Report

Total Test Vectors	Total Test Cases	✅ Passed	❌ Failed	⚠️ Skipped
10	10	10	0	0

✅ All test vectors passed

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Automatically generated at: 2024-08-28T18:21:37.493Z

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.61%. Comparing base (7d7e6d5) to head (be05c5d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
+ Coverage   93.59%   93.61%   +0.02%     
==========================================
  Files          36       36              
  Lines        1374     1379       +5     
==========================================
+ Hits         1286     1291       +5     
  Misses         88       88              

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