feat: add doubao channel

relay/channel/doubao/constants.go

@@ -0,0 +1,15 @@
+package doubao
+
+// https://console.volcengine.com/ark/region:ark+cn-beijing/model
+
+var ModelList = []string{
+	"Doubao-pro-128k",
+	"Doubao-pro-32k",
+	"Doubao-pro-4k",
+	"Doubao-lite-128k",
+	"Doubao-lite-32k",
+	"Doubao-lite-4k",
+	"Doubao-embedding",
+}
+
+var ChannelName = "doubao"

relay/channel/doubao/relay-doubao.go

@@ -0,0 +1,10 @@
+package doubao
+
+import (
+	"fmt"
+	relaycommon "one-api/relay/common"
+)
+
+func GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
+	return fmt.Sprintf("%s/api/v3/chat/completions", info.BaseUrl), nil
+}