REFACTOR: Extension manager compatible with toolkits

[Samuelopez-ansys]

Description

Toolkits are going to be installed as a program. This refactoring is to allow easy installation of toolkits (Antenna and magnet toolkit)

Issue linked

Close #6113
Close #6036

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 85.22%. Comparing base (07edcc1) to head (69e08db).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6115      +/-   ##
==========================================
+ Coverage   85.20%   85.22%   +0.01%     
==========================================
  Files         169      169              
  Lines       64033    64036       +3     
==========================================
+ Hits        54559    54572      +13     
+ Misses       9474     9464      -10     

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[SMoraisAnsys]

I didn't finished to review but the changes seem great. I'll take more time later

[hui-zhou-a]

LGTM.