Implement OTIO to SVG adapter

[KarthikRIyer]

Closes #519

Squashed version of #649

[codecov-commenter]

Codecov Report

Merging #1038 (4664d4a) into master (0682256) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1038      +/-   ##
==========================================
- Coverage   79.30%   79.30%   -0.01%     
==========================================
  Files         113      113              
  Lines        6098     6102       +4     
==========================================
+ Hits         4836     4839       +3     
- Misses       1262     1263       +1     

Flag	Coverage Δ
unittests	79.30% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ybind11/include/pybind11/detail/type_caster_base.h	64.18% <0.00%> (-0.34%)	⬇️
src/deps/pybind11/include/pybind11/attr.h	76.92% <0.00%> (ø)
src/deps/pybind11/include/pybind11/cast.h	85.03% <0.00%> (ø)
src/deps/pybind11/include/pybind11/detail/init.h	100.00% <0.00%> (ø)
src/deps/pybind11/include/pybind11/detail/common.h	66.66% <0.00%> (ø)
src/deps/pybind11/include/pybind11/pybind11.h	77.83% <0.00%> (+0.07%)	⬆️
src/deps/pybind11/include/pybind11/pytypes.h	81.73% <0.00%> (+0.08%)	⬆️
src/deps/pybind11/include/pybind11/detail/class.h	73.40% <0.00%> (+0.08%)	⬆️

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[meshula]

Thanks for making a new PR! The CI issues seem cleared up.