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.

controller/option.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"one-api/common"
 	"one-api/model"
+	"one-api/setting"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -83,7 +84,7 @@ func UpdateOption(c *gin.Context) {
 			return
 		}
 	case "GroupRatio":
-		err = common.CheckGroupRatio(option.Value)
+		err = setting.CheckGroupRatio(option.Value)
 		if err != nil {
 			c.JSON(http.StatusOK, gin.H{
 				"success": false,