FEAT: Icepak analysis class

[Samuelopez-ansys]

Description

Add a new class to contain Icepak Analysis features.
Add type annotations in design.py

Issue linked

#5572

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

Attention: Patch coverage is 99.02913% with 2 lines in your changes missing coverage. Please review.

Project coverage is 85.29%. Comparing base (75afcb8) to head (338ab14).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5574      +/-   ##
==========================================
+ Coverage   85.27%   85.29%   +0.01%     
==========================================
  Files         151      152       +1     
  Lines       60840    60868      +28     
==========================================
+ Hits        51884    51915      +31     
+ Misses       8956     8953       -3