feat: convert gemini format to openai chat completions

relay/channel/claude_code/adaptor.go

@@ -25,6 +25,11 @@ type Adaptor struct {
 	RequestMode int
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	// Use configured system prompt if available, otherwise use default
 	if info.ChannelSetting.SystemPrompt != "" {