REFACTOR: Extension architecture using common class

[SMoraisAnsys]

Description

This PR aims at refactoring the extension by providing a common class. This class encapsulate a few common behavior of the current extensions and it is used + tested to created the template extension.

Issue linked

Associated to #6228

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 95.53571% with 5 lines in your changes missing coverage. Please review.

Project coverage is 85.23%. Comparing base (629efaa) to head (dd03647).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6238      +/-   ##
==========================================
+ Coverage   85.22%   85.23%   +0.01%     
==========================================
  Files         170      170              
  Lines       64364    64463      +99     
==========================================
+ Hits        54855    54946      +91     
- Misses       9509     9517       +8     

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[hui-zhou-a]

LGTM. I like it a lot!

[MaxJPRey]

Great code @SMoraisAnsys .

[Samuelopez-ansys]

SUPER!

[Samuelopez-ansys]

Great job!