FEAT: Update create_setup method

[Devin-Crawford]

Allow a list to be passed
for the "Frequency" argument to Hfss.create_setup() and automatically apply the multi-frequency adapt setup.

Description

Resolve issue #6278. Add unit test to /test/system/general/test_11_Setup.py

Issue linked

Please mention the issue number or describe the problem this pull request addresses.

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 85.25%. Comparing base (f059f32) to head (8f89682).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6279      +/-   ##
==========================================
+ Coverage   85.24%   85.25%   +0.01%     
==========================================
  Files         173      173              
  Lines       65290    65294       +4     
==========================================
+ Hits        55654    55667      +13     
+ Misses       9636     9627       -9     

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