Invenio-app-ils

- eitems: add required type field to data model (breaking change)
- physical items: add identifiers field
- documents: add MULTIMEDIA document type

- patch: add record pid to error display

- records_relation: Simplify sorting
- records_relations: Use sort_by paramemter from configs instead
- relations: Add functionality to sort json refs by relation_type
- tests: circulation: Add new location for testing closures
- circulation: loan_request: Fix dates comparison in get_offset_duration
- tests: loan request: fix test for minimum days before request
- circulation: Consider closures dates when verifying loan request dates

- circulation: Made loan request start date to be configurable and validated at the backend

- facets: fix boolean query

- facets: fix range query