reporeformat V2 (#23)

* reformat factor implement process

* move some code to more reasonable place

* fix the bug

* add test function in factor_extract_and_implement.py

* change select factor number to ratio , add some factor implement setting and fix some bug while using knowledgebase

* change evoagent

* add abstract class EvoAgent

* add benchmark workflow

* fix some bug in llm_utils

* run wenjun's code

* fix the knowledgebase instance check

---------

Co-authored-by: xuyang1 <xuyang1@microsoft.com>

rdagent/core/implementation.py

@@ -0,0 +1,24 @@
+from abc import ABC, abstractmethod
+from typing import List
+
+from rdagent.core.task import (
+    TaskImplementation,
+)
+
+class TaskGenerator(ABC):
+    @abstractmethod
+    def generate(self, *args, **kwargs) -> List[TaskImplementation]:
+        raise NotImplementedError("generate method is not implemented.")
+
+    def collect_feedback(self, feedback_obj_l: List[object]):
+        """
+        When online evaluation.
+        The preivous feedbacks will be collected to support advanced factor generator
+
+        Parameters
+        ----------
+        feedback_obj_l : List[object]
+
+        """
+
+