Add Github Action for cleaning up PR doc previews

[alfredclwong]

merge asap pls

[codecov-io]

Codecov Report

Merging #85 (b307922) into main (ff8b93d) will decrease coverage by 0.88%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
- Coverage   48.64%   47.75%   -0.89%     
==========================================
  Files          56       55       -1     
  Lines        6474     6431      -43     
==========================================
- Hits         3149     3071      -78     
- Misses       3325     3360      +35     

Impacted Files	Coverage Δ
src/Geometry/Primitives/Qtype.jl	75.00% <0.00%> (-8.34%)	⬇️
src/Optical/LensAssembly.jl	48.22% <0.00%> (-7.33%)	⬇️
src/Optical/OpticalInterface.jl	62.68% <0.00%> (-4.42%)	⬇️
src/Geometry/CSG/Intersection.jl	48.57% <0.00%> (-2.14%)	⬇️
src/Geometry/Geometry.jl	0.00% <0.00%> (-1.86%)	⬇️
src/Geometry/CSG/Interval.jl	83.20% <0.00%> (-0.37%)	⬇️
src/Geometry/Primitives/Curves/BSpline.jl	77.51% <0.00%> (-0.35%)	⬇️
src/Geometry/CSG/CSG.jl	84.88% <0.00%> (-0.06%)	⬇️
src/GlassCat/GlassCat.jl
src/Geometry/Primitives/Curves/Knots.jl	92.30% <0.00%> (+2.30%)	⬆️

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