Harte Chords

The twelve-bit encoding from C, as multi_hot_encoding gives it; the second row is counted from the root.

A Harte label is a root, an optional shorthand, an optional list of degrees in parentheses and an optional bass degree after a slash: C:maj7/3, Bb:(b3,5,b7,9), F:sus4(*3,9) where *3 removes the third, and N for no chord. This is the harte-library reading, ported into the crate and checked against all 8,064 labels in that library's coverage set.