DATAMONGO-850 - Add support for full text search via $text

transition from BasicQuery to Query.
DATAMONGO-976 - Add support for reading $meta projection on textScore into document.

We introduced @TextScore that can be used to mark a property to take { $meta : “textScore” }. Different to @Transient the value will be considered when reading documents. 
The value can and will only get picked up if the score field is retrieved from the store.