REFACTOR: pathlib refactor multi-files

[anur7]

Description

Pathlib refactor of multiple files: maxwellcircuit.py, object_3d.py, q3d.py, test_36_Q2D_Postprocessing.py, modeler_pcb.py

Issue linked

issue #5180

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have agreed with the Contributor License Agreement (CLA).

[ansys-reviewer-bot]

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[codecov]

Codecov Report

Attention: Patch coverage is 67.85714% with 9 lines in your changes missing coverage. Please review.

Project coverage is 85.00%. Comparing base (10d9716) to head (94fafb9).
Report is 18 commits behind head on main.

❌ Your patch status has failed because the patch coverage (67.85%) is below the target coverage (85.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5943      +/-   ##
==========================================
- Coverage   85.01%   85.00%   -0.01%     
==========================================
  Files         162      162              
  Lines       62603    62603              
==========================================
- Hits        53219    53215       -4     
- Misses       9384     9388       +4     

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[DaveTwyman]

Sorry this isn't my PR, opened the wrong one and clicked Update Branch and Marked as ready for review, Sorry

[jvela018]

LGTM