feat: select game duration

app/src/main/java/network/protocol/packets/StartGamePacket.java

@@ -13,10 +13,12 @@ public class StartGamePacket extends Packet {
 	private final String serializedSudoku;
 	// used to resume game
 	private final Instant instant;
+	private final long gameDuration;
 
-	public StartGamePacket(String serializedSudoku, Instant instant) {
+	public StartGamePacket(String serializedSudoku, Instant instant, long gameDuration) {
 		this.serializedSudoku = serializedSudoku;
 		this.instant = instant;
+		this.gameDuration = gameDuration;
 	}
 
 	public String getSerializedSudoku() {
@@ -27,6 +29,10 @@ public class StartGamePacket extends Packet {
 		return instant;
 	}
 
+	public long getGameDuration() {
+		return gameDuration;
+	}
+
 	@Override
 	public void accept(PacketVisitor packetVisitor) {
 		packetVisitor.visitPacket(this);