feat: capability to close designs (also on modeler.exit())

[RobPasMue]

Description

Allows for closing designs on demand. Experimental feature - only known to work with SpaceClaim and Discovery. Geometry Service may throw back errors but we are ignoring it for now since it is intended to be shortlived.

Issue linked

Closes #1399

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 85.71429% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.83%. Comparing base (3044faa) to head (38a22e9).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ansys/geometry/core/designer/design.py	85.71%	2 Missing ⚠️
src/ansys/geometry/core/misc/checks.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1409      +/-   ##
==========================================
- Coverage   91.84%   91.83%   -0.01%     
==========================================
  Files          86       86              
  Lines        6905     6922      +17     
==========================================
+ Hits         6342     6357      +15     
- Misses        563      565       +2     

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[RobPasMue]

Core services require proper handling of Design closure... waiting on that.