Implement ts_debug

[JoshInnis]

tsquery_phrase ( query1 tsquery, query2 tsquery ) → tsquery Constructs a phrase query that searches for matches of query1 and query2 at successive lexemes (same as <-> operator). tsquery_phrase(to_tsquery('fat'), to_tsquery('cat')) → 'fat' <-> 'cat'

tsquery_phrase ( query1 tsquery, query2 tsquery, distance integer ) → tsquery Constructs a phrase query that searches for matches of query1 and query2 that occur exactly distance lexemes apart. tsquery_phrase(to_tsquery('fat'), to_tsquery('cat'), 10) → 'fat' <10> 'cat'