feat: implement new handlers for audio, image, embedding, and responses processing

- Added new handlers: AudioHelper, ImageHelper, EmbeddingHelper, and ResponsesHelper to manage respective requests.
- Updated ModelMappedHelper to accept request parameters for better model mapping.
- Enhanced error handling and validation across new handlers to ensure robust request processing.
- Introduced support for new relay formats in relay_info and updated relevant functions accordingly.

relay/claude_handler.go

@@ -46,13 +46,11 @@ func ClaudeHelper(c *gin.Context) (claudeError *dto.ClaudeErrorWithStatusCode) {
 		relayInfo.IsStream = true
 	}
 
-	err = helper.ModelMappedHelper(c, relayInfo)
+	err = helper.ModelMappedHelper(c, relayInfo, textRequest)
 	if err != nil {
 		return service.ClaudeErrorWrapperLocal(err, "model_mapped_error", http.StatusInternalServerError)
 	}
 
-	textRequest.Model = relayInfo.UpstreamModelName
-
 	promptTokens, err := getClaudePromptTokens(textRequest, relayInfo)
 	// count messages token error 计算promptTokens错误
 	if err != nil {