feat: separate graphics target

[RobPasMue]

Description

Making graphics an optional target inside PyAnsys Geometry. If users now want graphics features they can install the package as follows:

pip install ansys-geometry-core[graphics]

Issue linked

Closes #1735 #1761

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)

[RobPasMue]

Documentation still needed... working on that

[codecov]

Codecov Report

Attention: Patch coverage is 94.54545% with 6 lines in your changes missing coverage. Please review.

Project coverage is 90.88%. Comparing base (b753d5e) to head (4141149).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ansys/geometry/core/misc/checks.py	86.36%	3 Missing ⚠️
src/ansys/geometry/core/misc/auxiliary.py	60.00%	2 Missing ⚠️
src/ansys/geometry/core/sketch/face.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1782      +/-   ##
==========================================
+ Coverage   90.87%   90.88%   +0.01%     
==========================================
  Files          92       92              
  Lines        8282     8357      +75     
==========================================
+ Hits         7526     7595      +69     
- Misses        756      762       +6     

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