[fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute

0.0.2: 2.3.0
0.0.3: 2.4.0
# missing 0.0.4 entry, that's alright
0.1.0: 2.6.0
0.1.2: 2.10.0