Eliminate Warnings

https://op-musicology.epfl.ch/projects/distant-listening-corpus/work_packages/1372/

All tests have passed for this repo according to the current standard, ms3 version 2.5.3

Metadata

No warnings here so this was pretty simple

full extraction with ms3 v2.4.0

• Involves adding the chords facet for accessing, not chord labels, but articulation, dynamics, etc.
• adds annotation workflow v4.3 (precommit hook)
• cleans up frictionless validation error
• standardizes README