Invenio-opendefinition

- mappings: add mappings for opensearch v1 and v2

- breaking change: drops ES2 support
- global: remove deprecated elasticsearch imports
- installation: upgrade invenio dependencies
- rest endpoints: remove deprecated `search_type` param

- fix installation dependencies

- add missing mapping fields and fix types for better search options

- fix fallback for missing `seeAlso` url

- Initial public release.