add per user voice activity support - #21
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Content
This PR adds per user voice activity support by measuring the audio level of each user, applying a bit of debounce and then passes the list of actively speaking with a widget.
Motivation and context
Voice activity indicators look very nice and can help deciphering who is speaking when you are in a new group.
#9
Screenshots / GIFs
UI Changes were made on the Sable Client Repository. Heres a screenshot for reference:

Tests
Automatic tests are done with a mock audio track and are written for the audio level measuring, voice activity and every debounce option.
Use of generative AI
observeAudioLevel.test.ts was written entirely by generative AI. Changes in main.ts were largely done with copilot autocomplete.
Additional Information
I was not sure what to do with the copyright header, so I took this header and filled in the information.