translation: update translations, improve schema

* Pulls translations from transifex.
* Removes unnecessary descriptions in document JSON schema.
* Turns labels into natural language in document JSON schema.
* Removes codes from the manual translations files that are translated
  through the label in the JSON schema form option.
* Copies the document JSON schema to the minimal document JSON schema.

Co-Authored-by: Igor Milhit <[email protected]>

Author: Igor Milhit

rero_ils/manual_translations.txt

@@ -48,7 +48,6 @@ _('bf:Manufacture')
 _('bf:Distribution')
 _('bf:Production')
 _('bf:Place')
-_('Date')
 
 # Harvested source
 _('ebibliomedia')