Fix transaction certificates in Conway and handle latest cardano-cli transaction commands

[KINGH242]

This pull request introduces 3 small but crucial fixes.

Certificates type in TransactionBody:

• Modified the certificates field in the TransactionBody class to accept either a List or a NonEmptyOrderedSet of Certificate objects, providing compatibility with the various ways transactions can be generated.

Cardano-cli Transaction submission:

• Enhanced the cardano-cli transaction submit method command by attempting to use the latest prefix for compatability with the latest versions with fallback to the original command.

Python version compatibility:

• Added a new utility function greater_than_version in pycardano/utils.py to check if the current Python version is greater than or equal to a specified version. This is used to conditionally import and utilize the member attribute from the enum module in Python 3.13+ to handle FutureWarning.

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 88.86%. Comparing base (503fb68) to head (1346a1a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pycardano/backend/cardano_cli.py	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #446      +/-   ##
==========================================
+ Coverage   88.75%   88.86%   +0.11%     
==========================================
  Files          33       33              
  Lines        4792     4804      +12     
  Branches      730      731       +1     
==========================================
+ Hits         4253     4269      +16     
+ Misses        378      374       -4     
  Partials      161      161              

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[cffls]

LGTM, thanks for the fixes!