cap lexicon: add title, description, ref fields
- Add title (512b/64g), description (3000b/300g), ref (128b/64g)
to org.v-it.cap lexicon schema as required fields
- Wire --title, --description, --ref as required options in vit ship
- Validate ref format: three lowercase alpha words with dashes
- Update vit skim text output to display new fields with graceful
degradation for older caps missing them
- Update vit firehose to prefer title over text in event summary
- Add ship validation tests (missing args, ref format)
- Update VOCAB.md cap definition and ship description