refactor: refactor evaluator structure

Author: ChenZiHong-Gavin

graphgen/models/evaluator/__init__.py

@@ -1,2 +1,2 @@
-from graphgen.models.evaluator.kg.kg_quality_evaluator import KGQualityEvaluator
-from graphgen.models.evaluator.qa.uni_evaluator import UniEvaluator
+from .qa import LengthEvaluator, MTLDEvaluator, RewardEvaluator, UniEvaluator
+from .kg import AccuracyEvaluator, ConsistencyEvaluator, StructureEvaluator

graphgen/models/evaluator/qa/__init__.py

@@ -0,0 +1,4 @@
+from .length_evaluator import LengthEvaluator
+from .mtld_evaluator import MTLDEvaluator
+from .reward_evaluator import RewardEvaluator
+from .uni_evaluator import UniEvaluator