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.

middleware/distributor.go

@@ -10,6 +10,7 @@ import (
 	"one-api/model"
 	relayconstant "one-api/relay/constant"
 	"one-api/service"
+	"one-api/setting"
 	"strconv"
 	"strings"
 	"time"
@@ -43,12 +44,12 @@ func Distribute() func(c *gin.Context) {
 		tokenGroup := c.GetString("token_group")
 		if tokenGroup != "" {
 			// check common.UserUsableGroups[userGroup]
-			if _, ok := common.GetUserUsableGroups(userGroup)[tokenGroup]; !ok {
+			if _, ok := setting.GetUserUsableGroups(userGroup)[tokenGroup]; !ok {
 				abortWithOpenAiMessage(c, http.StatusForbidden, fmt.Sprintf("令牌分组 %s 已被禁用", tokenGroup))
 				return
 			}
 			// check group in common.GroupRatio
-			if _, ok := common.GroupRatio[tokenGroup]; !ok {
+			if !setting.ContainsGroupRatio(tokenGroup) {
 				abortWithOpenAiMessage(c, http.StatusForbidden, fmt.Sprintf("分组 %s 已被弃用", tokenGroup))
 				return
 			}