feat: grpc reachitecture - several modules

[RobPasMue]

Attempting the rearchitect of several stubs

[codecov]

Codecov Report

Attention: Patch coverage is 92.52669% with 21 lines in your changes missing coverage. Please review.

Project coverage is 90.55%. Comparing base (4a6ba33) to head (d0bd397).

Files with missing lines	Patch %	Lines
...rc/ansys/geometry/core/_grpc/_services/_service.py	91.46%	7 Missing ⚠️
src/ansys/geometry/core/designer/design.py	81.08%	7 Missing ⚠️
...ys/geometry/core/_grpc/_services/v0/conversions.py	88.37%	5 Missing ⚠️
src/ansys/geometry/core/designer/body.py	92.85%	1 Missing ⚠️
src/ansys/geometry/core/modeler.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1988      +/-   ##
==========================================
+ Coverage   90.35%   90.55%   +0.19%     
==========================================
  Files         123      133      +10     
  Lines        9833     9705     -128     
==========================================
- Hits         8885     8788      -97     
+ Misses        948      917      -31     

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