API: addMatrixCons supports ExprCons

[Zeroto521]

closes to #1034

[Joao-Dionisio]

(it will take a little bit for me to be able to look into this)

[Joao-Dionisio]

@Zeroto521 can you edit your test so that addMatrixCons receives an ExprCons, but then the shape of the other arguments doesn't match?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.34%. Comparing base (6452ea6) to head (b3b4008).
⚠️ Report is 16 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1036      +/-   ##
==========================================
+ Coverage   54.13%   54.34%   +0.21%     
==========================================
  Files          22       23       +1     
  Lines        5045     5255     +210     
==========================================
+ Hits         2731     2856     +125     
- Misses       2314     2399      +85     

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[Copilot]

Pull Request Overview

This PR extends the addMatrixCons method to accept both ExprCons and MatrixExprCons objects, providing more flexibility in constraint handling. The change allows scalar expression constraints to be passed to the matrix constraint function.

Key changes:

• Modified addMatrixCons to accept both ExprCons and MatrixExprCons types
• Updated tests to reflect the new API behavior
• Updated documentation and changelog

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/pyscipopt/scip.pxi	Updated addMatrixCons method signature and implementation to handle both constraint types
tests/test_matrix_variable.py	Modified test cases to verify new functionality and updated method calls
CHANGELOG.md	Added entry documenting the API change

Comments suppressed due to low confidence (1)

CHANGELOG.md:21

• The method name should be consistently capitalized. It should be 'addMatrixCons' not 'AddMatrixCons' to match the actual method name.

- AddMatrixCons also accepts ExprCons.