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 84.12%. Comparing base (7fece27) to head (b3075d8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6279      +/-   ##
==========================================
- Coverage   85.28%   84.12%   -1.16%     
==========================================
  Files         173      173              
  Lines       65358    65362       +4     
==========================================
- Hits        55742    54988     -754     
- Misses       9616    10374     +758     

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