Steel i profile strength class 3 moment

[GerjanDorgelo]

Must be evaluated after #836 is merged

Description

Adds bending moment checks to steel i class 3 strenght checks

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• I have added tests that prove my fix is effective or that my feature works
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes

[github-actions]

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[Copilot]

Pull request overview

This PR adds bending moment resistance checks to the steel I-profile class 3 strength verification according to Eurocode 3. The implementation extends the existing normal force checks with single-axis bending moment checks (My and Mz axes), following EC3 chapter 6.2.5.

Key changes:

• Implementation of SingleAxisBendingMoment check class with support for both My and Mz axes
• Introduction of SAF (Structural Analysis Format) data structures for representing internal forces
• Reorganization of check module structure with proper separation of steel and concrete checks

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
blueprints/saf/results/result_internal_force_1d.py	New dataclass implementing SAF standard for 1D internal forces with validation
blueprints/checks/steel/strength/steel_i_profile_strength_class_3.py	Main implementation adding SingleAxisBendingMoment check class and integration into overall check method
blueprints/unit_conversion.py	Added KNM_TO_NMM conversion constant for moment units
tests/checks/steel/strength/test_steel_i_profile_strength_class_3.py	Comprehensive tests for normal force and bending moment checks with multiple force permutations
tests/saf/forces/test_result_internal_force_1d.py	Unit tests for SAF internal force dataclass including validation and edge cases
Various __init__.py files	Package structure reorganization and documentation updates

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2b5e218) to head (f640632).

Additional details and impacted files

@@                                    Coverage Diff                                     @@
##           840-feature-request-add-first-steel-check-to-blueprints      #845    +/-   ##
==========================================================================================
  Coverage                                                   100.00%   100.00%            
==========================================================================================
  Files                                                          395       396     +1     
  Lines                                                        12155     12291   +136     
==========================================================================================
+ Hits                                                         12155     12291   +136     

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