Find mentities by full name trying firt by prefix then by similarity

Property definitions

nitc $ ModelIndex :: find_by_full_name
	# Find mentities by full name trying firt by prefix then by similarity
	fun find_by_full_name(name: String, filter: nullable ModelFilter): IndexMatches do
		var results = find_by_full_name_prefix(name)
		results.add_all find_by_full_name_similarity(name, filter)
		return results
	end
src/model/model_index.nit:408,2--413,4