Possibly generate `handNote/@scope` from `sourceDoc` content

[gerritbruening]

As discussed this morning, it might be feasible to do the following:

1. analyze sourceDoc content: character count for any appearing @new first part (writing hand)
2. infer from this whether these hands are sole (only one hand), major (say, more than 50%) or minor (less than 50%) in the sense of the TEI Guidelines
3. generate msDesc/physDesc/handDesc/handNote (BTW, this would be a considerable change to our TEI files, since most of the sourceDesc is stored in non-TEI XML until now)

@thvitt, is this specific enough for you to evaluate this possibility?

[thvitt]

should be doable. I expect the implementation to trigger lots of detail questions …