With a new entities export

Metadata added for harvesting by CLARIAH.

New version of entity annotations by Sophie Arnoult.

Note on the attachments:

No need to download them manually. They will be fetched by Text-Fabric when needed.

• tf: the main corpus
• voc-missives-export entity annotations as produced in cltl/voc-missives
• voc-missives-migrated entity annotations as migrated from an earlier version in cltl/voc-missives
• exercises-entities: results of toy example of creating entity annotations
• exercises-numerics: results of toy example of creating other annotations