Support for Imprinted Assemblies

[jmwright]

@shimwell Please take a look and see if this addresses #17 . Please note the new test, and I have attached the sample msh file that is generated by that test.

tagged_imprinted_mesh.msh.zip

I can restructure the new code if desired. This method combines creating the mesh and writing it unlike the previous methods. I also do not currently include physical groups for non-tagged surfaces. I cannot remember if we've discussed whether physical groups for non-tagged surfaces are important.

This method also does not support subshapes, but that will be easy enough to add if this method seems like it will work for you.

[shimwell]

I am seeing this error in the CI

I guess we need to update this line in the environment.yml file which installs cadquery stable. I guess we need the cadquery master from cadquery channel
https://github.com/CadQuery/assembly-mesh-plugin/blob/d1f6a8f4c0f5286c0f5e9fffd8bbf590337ff637/environment.yml#L6C1-L6C13

         for s in res.Solids():
            ids = tuple(id_map[Solid(el)] for el in bldr.GetOrigins(s.wrapped))
            # if GetOrigins yields nothing, solid was not modified
>           origins[s] = ids if ids else (id_map[s],)
E           KeyError: <cadquery.occ_impl.shapes.Solid object at 0x7f879e024e50>

/usr/share/miniconda/envs/tagged-meshes/lib/python3.11/site-packages/cadquery/occ_impl/assembly.py:596: KeyError
----------------------------- Captured stderr call -----------------------------
Warning : Gmsh has aleady been initialized
=============================== warnings summary ===============================
<frozen importlib._bootstrap>:241
  <frozen importlib._bootstrap>:241: DeprecationWarning: builtin type SwigPyPacked has no __module__ attribute

<frozen importlib._bootstrap>:241
  <frozen importlib._bootstrap>:241: DeprecationWarning: builtin type SwigPyObject has no __module__ attribute

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================== short test summary info ============================
FAILED tests/test_meshes.py::test_imprinted_assembly - KeyError: <cadquery.occ_impl.shapes.Solid object at 0x7f879e024e50>
=================== 1 failed, 6 passed, 2 warnings in 3.92s ====================
sys:1: DeprecationWarning: builtin type swigvarlink has no __module__ attribute

[shimwell]

@SteSeg this PR should make the sort of flexible meshing from cadquery assembly possible

I attempted the cadquery assembly meshing here but found imprinting was needed fusion-energy/cad_to_dagmc#132

So Jeremy has kindly added imprinting to the package

Feedback welcome

[shimwell]

Looks good to me, LGTM