Move ai handlers to specific folder

pr_agent/algo/ai_handlers/base_ai_handler.py

@@ -0,0 +1,20 @@
+from abc import ABC, abstractmethod
+
+class BaseAiHandler(ABC):
+    """
+    This class defines the interface for an AI handler.
+    """
+
+    @abstractmethod
+    def __init__(self):
+        pass
+
+    @property
+    @abstractmethod
+    def deployment_id(self):
+        pass
+
+    @abstractmethod
+    async def chat_completion(self, model: str, system: str, user: str, temperature: float = 0.2):
+        pass
+