feat: Introduce settings package and refactor constants

- Added a new `setting` package to replace the `constant` package for configuration management, improving code organization and clarity.
- Moved various configuration variables such as `ServerAddress`, `PayAddress`, and `SensitiveWords` to the new `setting` package.
- Updated references throughout the codebase to use the new `setting` package, ensuring consistent access to configuration values.
- Introduced new files for managing chat settings and midjourney settings, enhancing modularity and maintainability of the code.

relay/relay-mj.go

@@ -15,6 +15,7 @@ import (
 	relaycommon "one-api/relay/common"
 	relayconstant "one-api/relay/constant"
 	"one-api/service"
+	"one-api/setting"
 	"strconv"
 	"strings"
 	"time"
@@ -111,8 +112,8 @@ func coverMidjourneyTaskDto(c *gin.Context, originTask *model.Midjourney) (midjo
 	midjourneyTask.StartTime = originTask.StartTime
 	midjourneyTask.FinishTime = originTask.FinishTime
 	midjourneyTask.ImageUrl = ""
-	if originTask.ImageUrl != "" && constant.MjForwardUrlEnabled {
-		midjourneyTask.ImageUrl = constant.ServerAddress + "/mj/image/" + originTask.MjId
+	if originTask.ImageUrl != "" && setting.MjForwardUrlEnabled {
+		midjourneyTask.ImageUrl = setting.ServerAddress + "/mj/image/" + originTask.MjId
 		if originTask.Status != "SUCCESS" {
 			midjourneyTask.ImageUrl += "?rand=" + strconv.FormatInt(time.Now().UnixNano(), 10)
 		}
@@ -421,7 +422,7 @@ func RelayMidjourneySubmit(c *gin.Context, relayMode int) *dto.MidjourneyRespons
 		if originTask == nil {
 			return service.MidjourneyErrorWrapper(constant.MjRequestError, "task_not_found")
 		} else { //原任务的Status=SUCCESS，则可以做放大UPSCALE、变换VARIATION等动作，此时必须使用原来的请求地址才能正确处理
-			if constant.MjActionCheckSuccessEnabled {
+			if setting.MjActionCheckSuccessEnabled {
 				if originTask.Status != "SUCCESS" && relayMode != relayconstant.RelayModeMidjourneyModal {
 					return service.MidjourneyErrorWrapper(constant.MjRequestError, "task_status_not_success")
 				}