Refine mapping of text classes

[cmil]

The original EarlyPrint documents assign the following values in their ep:subgenre elements:

• CO
• closet drama
• comedy
• dialogue
• entertainment
• history play
• interlude
• masque
• preface to a collection of plays
• preface to a collection of plays
• tragedy
• tragicomedy

In 97fa5ed the mapping of "comedy", "tragedy" and "tragicomedy" to their respective Wikidata IDs has been implemented. We should decide if and how to map the remaining subgenres.

[cmil]

@lucagiovannini7, @peertrilcke The DraCor API currently supports the text classes "Comedy", "Tragedy", "Tragicomedy", "Satyr play" and "Libretto" via their respective Wikidata IDs (see https://github.com/dracor-org/dracor-api/blob/0fe102e735708e4f3cfe3e736d54b23a3a1a9514/modules/config.xqm#L77). Should we

1. just ignore the EarlyPrint ep:subgenres that are not exactly match those text classes,
2. somehow map the at least some of the ep:subgenres to our text classes, or
3. add more text classes to the DraCor API to support more ep:subgenres?

This may also be relevant for dracor-org/dracor-schema#52.

[peertrilcke]

I would prefer a combination of 1 and 2: We ignore the corpus-specific EP subgenres (1). In addition, @lucagiovannini7 could successively make a careful adaptation of the obvious EP subgenres to the subgenres used by DraCor so far (2)
I lack a systematic approach to (3). Here we should define an extended controlled vocabulary in perspective. In my opinion, however, this is a larger and different task.