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/group.go

@@ -3,13 +3,13 @@ package controller
 import (
 	"github.com/gin-gonic/gin"
 	"net/http"
-	"one-api/common"
 	"one-api/model"
+	"one-api/setting"
 )
 
 func GetGroups(c *gin.Context) {
 	groupNames := make([]string, 0)
-	for groupName, _ := range common.GroupRatio {
+	for groupName, _ := range setting.GetGroupRatioCopy() {
 		groupNames = append(groupNames, groupName)
 	}
 	c.JSON(http.StatusOK, gin.H{
@@ -24,9 +24,9 @@ func GetUserGroups(c *gin.Context) {
 	userGroup := ""
 	userId := c.GetInt("id")
 	userGroup, _ = model.CacheGetUserGroup(userId)
-	for groupName, _ := range common.GroupRatio {
+	for groupName, _ := range setting.GetGroupRatioCopy() {
 		// UserUsableGroups contains the groups that the user can use
-		userUsableGroups := common.GetUserUsableGroups(userGroup)
+		userUsableGroups := setting.GetUserUsableGroups(userGroup)
 		if _, ok := userUsableGroups[groupName]; ok {
 			usableGroups[groupName] = userUsableGroups[groupName]
 		}