[Feature Request] Integrate annotationlib for restoring archived video annotations

[uwx]

Description

Invidious includes supports for restoring annotations with annotationlib. While this can be relatively trivially done by modifying the existing AnnotationsRestored extension, it would be cool to have integrated support.

Describe the solution you'd like

This bit downloads annotation XML files: https://github.com/isaackd/AnnotationsRestored/blob/master/js/background.js
This library renders the annotations client-side: https://github.com/isaackd/annotationlib