Add fields ID, StartTime, and EndTime in UserDataPacket

[lemonlinger]

server-sdk-go/localparticipant.go

Lines 326 to 344 in b8538ae

	// UserDataPacket is a custom user data that can be sent via WebRTC on a custom topic.
	type UserDataPacket struct {
	Payload []byte
	Topic string // optional
	}
	// ToProto implements DataPacket.
	func (p *UserDataPacket) ToProto() *livekit.DataPacket {
	var topic *string
	if p.Topic != "" {
	topic = proto.String(p.Topic)
	}
	return &livekit.DataPacket{Value: &livekit.DataPacket_User{
	User: &livekit.UserPacket{
	Payload: p.Payload,
	Topic: topic,
	},
	}}
	}

Can we add fields ID, StartTime, and EndTime in UserDataPacket ？These fields are already in protocol. See https://github.com/livekit/protocol/blob/37cb4c8b250d7dc12da1c288e961bde46c8fa15f/livekit/livekit_models.pb.go#L2265-L2293