Support model config in LLMs (#1495)

mem0/llms/base.py

@@ -1,7 +1,21 @@
+from typing import Optional
 from abc import ABC, abstractmethod
 
+from mem0.configs.llms.base import BaseLlmConfig
+
 
 class LLMBase(ABC):
+    def __init__(self, config: Optional[BaseLlmConfig] = None):
+        """Initialize a base LLM class
+
+        :param config: LLM configuration option class, defaults to None
+        :type config: Optional[BaseLlmConfig], optional
+        """
+        if config is None:
+            self.config = BaseLlmConfig()
+        else:
+            self.config = config
+
     @abstractmethod
     def generate_response(self, messages):
         """