[meta] generating docs

[pq]

meta-issue tracking work around generating docs.

stuff to consider:

• lua script docs
  • script tagging (require grid/midi, etc) [docs] investigate script doc tagging #104
  • embedded long-form docs [docs] consider generating long-form script docs from embedded ldoc sections #100
• sc engine docs
  • how might scdoc and schelp fit in?
• documentation for writing docs (script, module and engine)

also related:

• maiden doc integration (consider an integrated help/docs view maiden#91)