feat: export and download stride format

[b-matteo]

Description

This PR implements the STRIDE format export and download in PyAnsys Geometry. Furthermore the design.download method now uses a more straightforward implementation, still allowing previous backend export and download workflows.

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 unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

Attention: Patch coverage is 82.50000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 91.17%. Comparing base (1bb39e5) to head (cdca2d9).
Report is 1 commits behind head on blitz.

Files with missing lines	Patch %	Lines
src/ansys/geometry/core/designer/design.py	82.50%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            blitz    #1698      +/-   ##
==========================================
- Coverage   91.33%   91.17%   -0.16%     
==========================================
  Files          91       91              
  Lines        7892     7924      +32     
==========================================
+ Hits         7208     7225      +17     
- Misses        684      699      +15     

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[RobPasMue]

Looking good!

[RobPasMue]

LGTM! Thanks @b-matteo - merging!