Add clipping functionality

[oliverroick]

Implements clipping

• Adds components to the AudioClipper components to display the clip window and handles to drag the clip window, as well as to activate clipping and the clipping toolbar
• Add useClipper hook, which implements the clipping functionality and exposes props for the clipping UI
• Changes to useSpectrogram are required so we can expose the spectrogram center (required to calculate the position of the clip window) and an indicator for dragging events to prevent resetting the clip window when dragging the spectrogram

NOTE The following still need to be implemented:

• Apply the clip before sending the search request to the API
• Editing the clip start/end times via the input. I decided to punt on this because it's more complex than initially thought. We're displaying the time as mm:ss, so we need to work around the colon in the input, making sure you can't delete, validate that the entered value is correct, (ie. you can't select a time outside the length of the audio, you can't enter invalid times like 01:63, and converting to seconds when handling the input)

[LanesGood]

Also noting:

• I'm still able to move the clip after clicking "confirm"
• In/Out inputs (which I know you mention will be worked on separately) currently render NaN before the clip is set - can be addressed later