Search 6 groundwork - Add spatial querying support

Description

Add a predicate in org.hibernate.search.v6poc.search.dsl.predicate.SearchPredicateContainerContext.
Add a sort in org.hibernate.search.v6poc.search.dsl.sort.SearchSortContainerContext.
See org.hibernate.search.v6poc.integrationtest.showcase.OrmElasticsearchLibraryShowcaseIT#searchAroundMe_spatial and implementations of org.hibernate.search.v6poc.integrationtest.showcase.library.dao.DocumentDao#searchAroundMe for tests in the showcase,
though we might want to test it more thoroughly in org.hibernate.search.v6poc.integrationtest.backend.tck.search.SearchPredicateIT.

Environment

None

Status

Assignee

Guillaume Smet

Reporter

Yoann Rodière

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Pull Request

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Fix versions

Priority

Major