refactor: refactor chat_handler, add support for Azure and ChatGLM

api/store/model/chat_model.go

@@ -0,0 +1,10 @@
+package model
+
+type ChatModel struct {
+	BaseModel
+	Platform string
+	Name     string
+	Value    string // API Key 的值
+	SortNum  int
+	Enabled  bool
+}