refactor: migrate group ratio and user usable groups logic to new setting package

- Replaced references to common.GroupRatio and common.UserUsableGroups with corresponding functions from the new setting package across multiple controllers and services.
- Introduced new setting functions for managing group ratios and user usable groups, enhancing code organization and maintainability.
- Updated related functions to ensure consistent behavior with the new setting package integration.

relay/relay-mj.go

@@ -168,7 +168,7 @@ func RelaySwapFace(c *gin.Context) *dto.MidjourneyResponse {
 			modelPrice = defaultPrice
 		}
 	}
-	groupRatio := common.GetGroupRatio(group)
+	groupRatio := setting.GetGroupRatio(group)
 	ratio := modelPrice * groupRatio
 	userQuota, err := model.CacheGetUserQuota(userId)
 	if err != nil {
@@ -474,7 +474,7 @@ func RelayMidjourneySubmit(c *gin.Context, relayMode int) *dto.MidjourneyRespons
 			modelPrice = defaultPrice
 		}
 	}
-	groupRatio := common.GetGroupRatio(group)
+	groupRatio := setting.GetGroupRatio(group)
 	ratio := modelPrice * groupRatio
 	userQuota, err := model.CacheGetUserQuota(userId)
 	if err != nil {