FIX: analyze_from_zero

[anur7]

Description

This PR fixes the bug in analyze_from_zero() method in maxwell.py.
The missing unit test of the will also be added in this PR.

Issue linked

Issue #6404

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).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.33%. Comparing base (3056555) to head (52813af).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6425   +/-   ##
=======================================
  Coverage   83.32%   83.33%           
=======================================
  Files         246      246           
  Lines       77442    77445    +3     
=======================================
+ Hits        64527    64537   +10     
+ Misses      12915    12908    -7     

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[nunesanderson]

@gmalinve I will leave it to you to approve it.
Thanks @anur7 for fixing the issue.

[gmalinve]

@anur7 see my comments.

[SMoraisAnsys]

Just à minor comment

sorry, need to close this