feat!: support constructors in contract creation via TransactionBuilder.append_create_contract_op

[overcat]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.65%. Comparing base (196dee2) to head (5cb2848).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #979   +/-   ##
=======================================
  Coverage   98.65%   98.65%           
=======================================
  Files         253      253           
  Lines       13319    13330   +11     
=======================================
+ Hits        13140    13151   +11     
  Misses        179      179           

Flag	Coverage Δ
unittests	98.65% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
stellar_sdk/transaction_builder.py	96.92% <100.00%> (ø)
tests/test_transaction_builder.py	100.00% <100.00%> (ø)