[Core] Construct ForwardEntity with a single sequence

[Wesley-Young]

• Added a new constructor ForwardEntity(uint sequence)
• Added a new method Forward(uint sequence) to MessageBuilder

[DarkRRb]

Throw:

trce: Lagrange.OneBot.Core.Network.Service.ForwardWSService[12]
      Receive(d337a034-17a0-4b30-ba32-cece9e5ad8eb) {"action":"send_group_msg","params":{"group_id":894446744,"message":[{"type":"reply","data":{"id":"-761034950"}},{"type":"text","data":{"text":"test"}}]}}
warn: Lagrange.Core.BotContext[0]
      [2025-02-08 07:42:36] [BusinessContext] [WARNING]: Error when processing the event: Lagrange.Core.Internal.Event.Message.SendMessageEvent
warn: Lagrange.Core.BotContext[0]
      [2025-02-08 07:42:36] [BusinessContext] [WARNING]: System.ArgumentOutOfRangeException: The UTC time represented when the offset is applied must be between year 0 and 10,000. (Parameter 'offset')
         at System.DateTimeOffset.ValidateDate(DateTime dateTime, TimeSpan offset)
         at System.DateTimeOffset..ctor(DateTime dateTime)
         at Lagrange.Core.Message.Entity.ForwardEntity.Lagrange.Core.Message.IMessageEntity.PackElement() in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Message\Entity\ForwardEntity.cs:line 71
         at Lagrange.Core.Message.MessagePacker.Build(MessageChain chain, String selfUid) in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Message\MessagePacker.cs:line 63
         at Lagrange.Core.Internal.Service.Message.SendMessageService.Build(SendMessageEvent input, BotKeystore keystore, BotAppInfo appInfo, BotDeviceInfo device, Span`1& output, List`1& extraPackets) in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Internal\Service\Message\SendMessageService.cs:line 18
         at Lagrange.Core.Internal.Service.BaseService`1.Lagrange.Core.Internal.Service.IService.Build(ProtocolEvent 
input, BotKeystore keystore, BotAppInfo appInfo, BotDeviceInfo device, Span`1& output, List`1& extraPackets) in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Internal\Service\BaseService.cs:line 32
         at Lagrange.Core.Internal.Context.ServiceContext.ResolvePacketByEvent(ProtocolEvent protocolEvent) in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Internal\Context\ServiceContext.cs:line 69
         at Lagrange.Core.Internal.Context.BusinessContext.SendEvent(ProtocolEvent event) in D:\.code\dotnet\Lagrange\Lagrange.Core\Lagrange.Core\Internal\Context\BusinessContext.cs:line 101