[ENH] Add fault relation example model and fix fault relation implementation

[NilsChudalla]

Description

In example "ch1_5", function set_fault_relation does not work as intended as described in issue #1074. I tried this in some other models, where the behaviour is still off. This is a WIP, where I turned the model from ch1_5 into a test. For this model it works.

I am willingt to try myself, @Leguark, but I spent quite some time in it already and am a bit out of ideas.

Added a new example model for fault relations testing and fixed an issue in the fault relations implementation. The bug was in the fault_relations property of the StructuralFrame class, where fault relations were not being properly set in the matrix. This PR adds a test case that verifies the correct implementation of fault relations.

Also added support for pandas StringArray type in the generate_ids_from_names function to handle different pandas data types properly. Updated the pandas dependency to require version 2.2.0 or higher.

Additionally, moved the geophysics tests from the "_geophysics_TO_UPDATE" directory to "test_geophysics" and updated the test verification files to match the current output format.

Checklist

• My code uses type hinting for function and method arguments and return values.
• I have created tests which cover my code.
• The test code either 1. demonstrates at least one valuable use case (e.g. integration tests)
  or 2. verifies that outputs are as expected for given inputs (e.g. unit tests).
• New tests pass locally with my changes.

[Leguark]

it is failing the new test looking for the data. I will look into it

    FileNotFoundError: [Errno 2] No such file or directory: '/home/leguark/buildAgent/work/d766739d2d98fcb9/gempy/API/..\\..\\examples\\data\\input_data\\tests\\fault_relations_test_surf.csv'

venv/lib/python3.13/site-packages/pandas/io/common.py:873: FileNotFoundError

[Leguark]

This line of code was removed in 2023 when I added the next case and no test was picking it up thank you Nils. Great catch!

[Leguark]

Thank you for finding such a huge bug and provide the a test for it!

my changes are breaking other functions looking into it

[Leguark]

Well, it took a couple of extra steps that had nothing to do with your PR. But this is ready for big green button to be pressed. I will do it and make a pip pre- release with the changes in case you need the code

[NilsChudalla]

Thank you very much Miguel! I am happy I could contribute. Also, I am learning a bunch!

[Leguark]

here the pre release pip install gempy==2025.2.1a1