Add "create_audio_clip" and "create_midi_clip" handler for tracks

[jmiceo]

Description

Supposedly since version 12.0.5, Ableton exposes functions for creating audio & midi clips on tracks directly. LOM documentation indeed mentions track.create_audio_clip and track.create_midi_clip. I saw some chatter about this functionality and wanted to propose a very simple implementation.

potentially resolves #123

Usage

With these changes, adding clips is trivial.

/live/track/create_audio_clip 1 "C:/test.wav" 0
/live/track/create_midi_clip 2 0 10

Checklist

• The title is descriptive and summarises the new changes
• The code and any comments are consistent with the current code style
• For any new or modified API endpoints, I have added appropriate documentation to README.md
• For any new or modified API endpoints, I have added unit tests covering the new functionality
• I have verified that all unit tests pass (see CONTRIBUTING.md for guidance)

The create_audio_track requires an absolute path to an audio file which adds complexity to writing tests.

[ideoforms]

Hi @jmiceo, that's great, thanks! I didn't realise that added to Arrangement is possible without using the Browser at all, so it does close #123.

Can you extend the Description field in the README to explicitly state that the clip is added in arrangement view?
I will then get this merged.

[jmiceo]

@ideoforms Done!

Between arrangement_clip interaction and create_audio_track needing an absolute path, I wasn't able to provide unit tests. I might look into arrangement_clip interaction later!