Add CDL adapter

[josh-mission]

** Please note ** This PR includes the same changes and replaces the closed PR here: https://github.com/AcademySoftwareFoundation/OpenTimelineIO/pull/1368 This is to avoid messy fixes solving commits missing the Sign-off after a merge with main to fix unrelated linting errors.

Link the Issue(s) this Pull Request is related to.

https://github.com/AcademySoftwareFoundation/OpenTimelineIO/issues/1366

Fixes #1366

Summarize your change.

This change adds a new adapter, 'cdl', which exports individual .cdl files to a user-provided directory for each clip/timeline event in an OTIO instance. This change does not change anything in the OTIO core.

Please note: Due to the nature of this adapter exporting multiple files instead of a single file, the provided export method name write_to_file is slightly semantically confusing. The output provided to the method should be the directory (not a file) in which you wish to export the .cdl's to. Because of this, it is also necessary to directly provide the adapter_name to use this adapter (there is no file extension to read): otio.adapters.write_to_file(timeline, '/your/cdl/output/directory', adapter_name='cdl')

Reference associated tests.

/contrib/opentimelineio_contrib/adapters/tests/test_cdl_adapter.py provides a straightforward test which takes a sample EDL, ingests into OTIO and exports temporary .cdl files via the adapter. Two of these CDL's are read in as samples and checked.

[jminor]

Hi, could you try out this template for making new adapters? We are planning to move the other contrib adapters to separate repos, so instead of accepting a new one in that area & then moving it, we would prefer to have new adapters built from this template: https://github.com/OpenTimelineIO/otio-plugin-template

Also, in future, when you have merge/rebase problems, you can force-push to your branch instead of making a new PR - that way the previous discussion is not lost.

[josh-mission]

e are planning to move the other contrib adapters to separate repos, so instead of accepting a new one in that area & then moving it, we would prefer to have new adapters built from this template: https://github.com/OpenTimelineIO/otio-plugin-template

Hi @jminor, I have implemented this using that new template here: https://github.com/josh-mission/otio-cdl-adapter

Deployed to PyPi here: https://pypi.org/project/otio-cdl-adapter

[apetrynet]

Awesome! You should add your plugin to the list of tools and projects

[josh-mission]

Closed. This PR has been refactored into an external adapter repo available here: https://github.com/josh-mission/otio-cdl-adapter

Deployed to PyPi here: https://pypi.org/project/otio-cdl-adapter