jts solr queries

This module is based on search_api_location feature request to allow indexing
polygons -> https://www.drupal.org/project/search_api_location/issues/3113266 So may change if patch is accepted. But meanwhile...

These are the features included in module:

• Override of the rpt datatype that restricts the solr indexing to lat,lon
  to allow indexing shapes. There's a subscription to datatypes event
  dispatched by search_api to overwrite the RPT datatype Class with the
  class provided by this module that is not filtering to lat,lon pair
  and allow more shapes.

• It provides a filter plugin for views. To search if user input point is
  being contained by the indexed polygons. (more predicates may be done, but
  not by now, look at possibilities in https://cwiki.apache.org/confluence/display/solr/SolrAdaptersForLuceneSpatial4#SolrAdaptersForLuceneSpatial4-SpatialPredicates)

• Also it adds the configuration to do spatial queries to the schema.xml
  configuration that generates search_api_solr. Replacing:

    <fieldType name="location_rpt" class="solr.SpatialRecursivePrefixTreeFieldType" geo="true" distErrPct="0.025" maxDistErr="0.001" distanceUnits="kilometers"/>
  

  with

    <fieldType name="location_rpt" class="solr.SpatialRecursivePrefixTreeFieldType"
              spatialContextFactory="org.locationtech.spatial4j.context.jts.JtsSpatialContextFactory"
          autoIndex="true"
          validationRule="repairBuffer0"
          distErrPct="0.025" maxDistErr="0.001" distanceUnits="kilometers" />
  

• TODO: Tests: With this module we can see how alter a search api query with
  jts_solr_queries_search_api_solr_converted_query_alter that modifies the select
  of a given search. It's the behavior that must be in the tests that must
  be done, search if there are any polygons indexed in a specified index that
  contains a given point, in code 'events' index is used.