Update AudioTrack layouts as per new designs

[dhruvkb]

Description

This PR updates the AudioTrack layouts, including subcomponents like Waveform to match the new mockups.

Changes

• Made Waveform component extensible to seamlessly fit in different layouts
  • Fixed the Waveform border to render edge to edge with other components
  • Background can now be changed
  • Bits of UI such as duration and timestamps can be toggled
• Added new layouts and sizes
  • Added Box layout in 3 sizes (absorbing and extending Create a box layout for the audio component #230)
  • Added S size for Full layout (not 100% ready because Add smaller size for Download button #510)
• Addressed focus and hover states for all AudioTrack layouts
• Updated documentation
  • Now clearly indicates default layouts and sizes
  • Enabled Storybook Viewport addon and configured mobile views to render in mobile viewport

Testing Instructions

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
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• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

Developer Certificate of Origin

Developer Certificate of Origin

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[obulat]

This will break so many other components. We'll need to find/replace before merging this PR.

[dhruvkb]

I already did the find-and-replace.

[obulat]

The component looks amazing!
One question about the license icon in the Box layout: is it supposed to be hidden and only shown on hover?

[zackkrida]

Really nice!

[dhruvkb]

@obulat the licenses appearing on hover was behaviour was confirmed by @panchovm.