refactor: refactor relay part (#935)

relay/channel/anthropic/model.go

@@ -0,0 +1,29 @@
+package anthropic
+
+type Metadata struct {
+	UserId string `json:"user_id"`
+}
+
+type Request struct {
+	Model             string   `json:"model"`
+	Prompt            string   `json:"prompt"`
+	MaxTokensToSample int      `json:"max_tokens_to_sample"`
+	StopSequences     []string `json:"stop_sequences,omitempty"`
+	Temperature       float64  `json:"temperature,omitempty"`
+	TopP              float64  `json:"top_p,omitempty"`
+	TopK              int      `json:"top_k,omitempty"`
+	//Metadata    `json:"metadata,omitempty"`
+	Stream bool `json:"stream,omitempty"`
+}
+
+type Error struct {
+	Type    string `json:"type"`
+	Message string `json:"message"`
+}
+
+type Response struct {
+	Completion string `json:"completion"`
+	StopReason string `json:"stop_reason"`
+	Model      string `json:"model"`
+	Error      Error  `json:"error"`
+}