draw_stackedbeamsplitters uses old leaf(...) function instead of new transform(...) function to apply a transform to a CSG node.

[BrianGun]

Pull Request Template

Description

deterministic ray tracing example wasn't working because draw_stackedbeamsplitters uses the old leaf(...) function to apply a transform to a CSG node rather than the new transform() function.

Fixes # (219)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Ran Documenter to create the documentation for the code and verified that the illustrations were correctly generated.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[codecov-commenter]

Codecov Report

Merging #220 (1c437ab) into main (83171f3) will decrease coverage by 0.89%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #220      +/-   ##
==========================================
- Coverage   56.55%   55.66%   -0.90%     
==========================================
  Files          67       65       -2     
  Lines        6372     6327      -45     
==========================================
- Hits         3604     3522      -82     
- Misses       2768     2805      +37     

Impacted Files	Coverage Δ
src/Examples/docs_examples.jl	0.00% <0.00%> (ø)
src/Geometry/Primitives/Qtype.jl	75.00% <0.00%> (-8.34%)	⬇️
src/Optical/LensAssembly.jl	48.93% <0.00%> (-7.24%)	⬇️
src/Optical/Emitters/Emitters.jl	75.00% <0.00%> (-5.00%)	⬇️
src/Optical/OpticalInterface.jl	63.23% <0.00%> (-4.30%)	⬇️
src/Geometry/CSG/Intersection.jl	48.57% <0.00%> (-2.14%)	⬇️
src/Geometry/Geometry.jl	0.00% <0.00%> (-2.05%)	⬇️
src/GlassCat/sources.jl	90.90% <0.00%> (-1.82%)	⬇️
src/Geometry/Primitives/Curves/BSpline.jl	66.15% <0.00%> (-0.52%)	⬇️
src/Geometry/CSG/CSG.jl	83.20% <0.00%> (-0.38%)	⬇️
... and 5 more

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