feat: add public tenant packages listing and sort order

src/Application/TakeoutSaaS.Application/App/Tenants/Commands/CreateTenantPackageCommand.cs

@@ -68,4 +68,9 @@ public sealed record CreateTenantPackageCommand : IRequest<TenantPackageDto>
     /// 是否可售。
     /// </summary>
     public bool IsActive { get; init; } = true;
+
+    /// <summary>
+    /// 展示排序，数值越小越靠前。
+    /// </summary>
+    public int SortOrder { get; init; } = 0;
 }