optimize: MJ 部分调整、优化

MJ
增加simple-change、list接口，
变换和重试操作区别出来，价格与绘图一样
优化图片返回

router/relay-router.go

@@ -49,10 +49,12 @@ func SetRelayRouter(router *gin.Engine) {
 	{
 		relayMjRouter.POST("/submit/imagine", controller.RelayMidjourney)
 		relayMjRouter.POST("/submit/change", controller.RelayMidjourney)
+		relayMjRouter.POST("/submit/simple-change", controller.RelayMidjourney)
 		relayMjRouter.POST("/submit/describe", controller.RelayMidjourney)
 		relayMjRouter.POST("/submit/blend", controller.RelayMidjourney)
 		relayMjRouter.POST("/notify", controller.RelayMidjourney)
 		relayMjRouter.GET("/task/:id/fetch", controller.RelayMidjourney)
+		relayMjRouter.POST("/task/list-by-condition", controller.RelayMidjourney)
 	}
 	//relayMjRouter.Use()
 }