Add factory reset functionality and update identity service

- Introduced a new DELETE endpoint `/api/admin/maintenance/factory-reset` for a complete reset of the admin panel, removing all users except the current admin and clearing various data.
- Implemented the `FactoryReset` method in `AdminMaintenanceEndpoints` to handle the reset logic.
- Added a new method `ListAllUserIdsExceptAsync` in `IIdentityService` to retrieve user IDs excluding a specified user, aiding in the factory reset process.
- Updated the frontend to include a confirmation dialog for the factory reset action, enhancing user experience and safety.
- Enhanced localization support for the new factory reset feature in both Russian and English, ensuring clarity for all users.

backend/src/PnvPanel.Api/Endpoints/AdminMaintenanceEndpoints.cs

@@ -23,6 +23,7 @@ public static class AdminMaintenanceEndpoints
         admin
             .MapDelete("/apps/disabled", DeleteDisabledApps)
             .Produces<MaintenanceCleanupResponseDto>();
+        admin.MapDelete("/factory-reset", FactoryReset).Produces(StatusCodes.Status204NoContent);
 
         return app;
     }
@@ -58,6 +59,15 @@ public static class AdminMaintenanceEndpoints
         return ToResponse(result);
     }
 
+    private static async Task<IResult> FactoryReset(
+        ISender sender,
+        CancellationToken cancellationToken
+    )
+    {
+        var result = await sender.Send(new FactoryResetCommand(), cancellationToken);
+        return result.ToHttpResult();
+    }
+
     private static IResult ToResponse(Result<int> result) =>
         result.IsSuccess
             ? Results.Ok(new MaintenanceCleanupResponseDto(result.Value))