Add core C++ support for otioz and otiod

[darbyjohnston]

Fixes #1869

This PR adds support for otioz and otiod bundles to the C++ API.

The code follows the original Python so the logic and error handling should be similar. The Python otioz and otiod adapters have been ported to use the new C++ functionality and the Python tests pass.

Differences from the Python implementation:

• Support for image sequences.
• The internal function timeline_for_bundle_and_manifest() handles the media relinking since it was the same for otioz and otiod. In the Python code the adapters handled the relinking.

Other notable changes:

• Added new dependencies for handling ZIP files (minizip-ng) and compression (zip-ng).
• Added new utility files like fileUtils.h and urlUtils.h.
• Removed the CMake option OTIO_DEPENDENCIES_INSTALL. I think if you are building the dependencies, they also need to be installed, there should not be an option to disable it.
• Added a temporary workaround for finding zlib-ng (zlibng-config.cmake). This file can hopefully be removed in the near future when minizip-ng improves their zlib-ng handling (cmake: better zlib-ng / zlib handling zlib-ng/minizip-ng#886).

Questions:

• Should bundle support be optional with a CMake flag?
• Should the otioz/otiod file versions be bumped?
• Should we use a third party library for URL handling? We only use file:// URLs, and do lossy conversions between file paths, so for now I implemented just the necessary functionality. All of the tests pass, but I'm not sure how comprehensive they are.
• I wasn't sure how to expose the Python bindings in the right namespace/module. Currently they are called like otio._otio.bundle.from_otiod(), it seems like the ._otio shouldn't be necessary.

Any suggestions on the naming, style, and usage of the changes are very welcome.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 64.19753% with 203 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.82%. Comparing base (c0e97b0) to head (c724fbb).
⚠️ Report is 61 commits behind head on main.

Files with missing lines	Patch %	Lines
src/opentimelineio/otioz.cpp	60.78%	60 Missing ⚠️
src/opentimelineio/bundleUtils.cpp	54.03%	57 Missing ⚠️
src/opentimelineio/otiod.cpp	54.92%	32 Missing ⚠️
src/opentimelineio/urlUtils.cpp	75.00%	20 Missing ⚠️
...timelineio/opentimelineio-bindings/otio_bundle.cpp	76.00%	12 Missing ⚠️
src/opentimelineio/errorStatus.cpp	0.00%	6 Missing ⚠️
...pentimelineio-bindings/otio_errorStatusHandler.cpp	0.00%	6 Missing ⚠️
src/opentimelineio/fileUtils.cpp	44.44%	5 Missing ⚠️
src/opentimelineio/bundle.cpp	71.42%	4 Missing ⚠️
...py-opentimelineio/opentimelineio/adapters/otiod.py	85.71%	1 Missing ⚠️

❌ Your changes status has failed because you have indirect coverage changes. Learn more about Unexpected Coverage Changes and reasons for indirect coverage changes.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1901      +/-   ##
==========================================
- Coverage   84.11%   83.82%   -0.30%     
==========================================
  Files         198      185      -13     
  Lines       22241    13320    -8921     
  Branches     4687     1208    -3479     
==========================================
- Hits        18709    11166    -7543     
+ Misses       2610     1981     -629     
+ Partials      922      173     -749     

Flag	Coverage Δ
py-unittests	83.82% <64.19%> (-0.30%)	⬇️

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

Files with missing lines	Coverage Δ
src/opentimelineio/errorStatus.h	100.00% <ø> (+4.34%)	⬆️
...melineio/opentimelineio-bindings/otio_bindings.cpp	98.49% <100.00%> (+0.13%)	⬆️
src/py-opentimelineio/opentimelineio/__init__.py	100.00% <ø> (ø)
...opentimelineio/opentimelineio/adapters/__init__.py	85.18% <ø> (-2.32%)	⬇️
...py-opentimelineio/opentimelineio/adapters/otioz.py	100.00% <100.00%> (+15.00%)	⬆️
tests/test_otiod.py	95.65% <100.00%> (-1.28%)	⬇️
tests/test_otioz.py	96.49% <100.00%> (-1.47%)	⬇️
...py-opentimelineio/opentimelineio/adapters/otiod.py	83.33% <85.71%> (+1.93%)	⬆️
src/opentimelineio/bundle.cpp	71.42% <71.42%> (ø)
src/opentimelineio/fileUtils.cpp	44.44% <44.44%> (ø)
... and 7 more

... and 128 files with indirect coverage changes

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