refactor: The first refactored version for sdk release (#907)

Co-authored-by: chengfangyin2 <chengfangyin3@jd.com>

dbgpt/model/proxy/llms/proxy_model.py

@@ -0,0 +1,9 @@
+from dbgpt.model.parameter import ProxyModelParameters
+
+
+class ProxyModel:
+    def __init__(self, model_params: ProxyModelParameters) -> None:
+        self._model_params = model_params
+
+    def get_params(self) -> ProxyModelParameters:
+        return self._model_params