feat: grpc reachitecture - several modules

[RobPasMue]

Attempting the rearchitect of several stubs

[codecov]

Codecov Report

Attention: Patch coverage is 92.52874% with 26 lines in your changes missing coverage. Please review.

Project coverage is 90.46%. Comparing base (5200e80) to head (c740715).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ys/geometry/core/_grpc/_services/v0/conversions.py	86.36%	9 Missing ⚠️
src/ansys/geometry/core/designer/design.py	81.08%	7 Missing ⚠️
...rc/ansys/geometry/core/_grpc/_services/_service.py	94.44%	5 Missing ⚠️
src/ansys/geometry/core/designer/face.py	90.00%	3 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%   90.46%   +0.10%     
==========================================
  Files         123      136      +13     
  Lines        9833     9717     -116     
==========================================
- Hits         8885     8790      -95     
+ Misses        948      927      -21     

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[RobPasMue]

Took longer than anticipated.. and still requires some final verifications. But most of the work is done. I'll continue shortly