js-api support for json-type queries

[runarmyklebust]

As seen here https://discuss.enonic.com/t/text-search-for-matches-in--path/1073 expressions where one is trying to increase score by adding boolean elements yields very large and complex queries. This could be done easier by supporting json queries and utilizing the es-like boolean expressions

{
  "query": {
    "bool": {
      "must": [
        {
          "fulltext": {
            "field": "someField",
            "query": "my query string"
          }
        }
      ],
      "should": [
        {
          "like": "*microsoft*"
        },
        {
          "in": [
            "fisk",
            "ost"
          ]
        }
      ]
    }
  }
}

[vbradnitski]

#6553 and #7081 could be implemented here.

[vbradnitski]

will be implemented in #8936