Multimodal UX - Audio Component

[nking-1]

Implements an audio component for the Jupyter widget.

1. Adds some plumbing for mock data to be passed from the audio() guidance function to the Jupyter widget.
2. Implements a new audio player component with waveform visualization. Still working on the look and feel, but core functionality, including start, stop, seek, and volume control, are all working.
3. Sets us up for handing off the current work to the back end team. We'll be working on image and video in the meantime.

[nking-1]

There are some large formatting changes to existing code from using the "Svelte for VS Code" extension. It seems like that's actually using Prettier under the hood. Sam and I chatted about this and will move forward with using it as our default formatter so hopefully the formatting changes won't happen again.