feat: Windows64 local multiplayer support (#13)

- Skip QuadrantSignin (profile selector) on Windows64 in both LoadMenu
  and CreateWorldMenu, proceeding directly to local play since Xbox Live
  stubs always return true for IsSignedInLive()
- Fix IsLocalMultiplayerAvailable() to not require IsHiDef() on Windows64
- Allow pad-connected players to join without a profile sign-in check
- Fix ghost RemotePlayer creation by scanning all local player slots and
  matching on server-assigned player index rather than controller slot,
  fixing P3/P4 ghost entities when joining out of controller order
- Give each player a unique name (Player 1-4) based on controller index
  instead of a single shared stub name
- Use raw XInput (XInputGetState) for secondary controller join detection,
  bypassing the 4J toggle system which consumes all button presses before
  game logic runs; uses a 120-frame latch for a reliable detection window
- Add .gitignore for Visual Studio build artifacts and output directories

Minecraft.Client/Common/UI/UIScene_CreateWorldMenu.cpp

@@ -992,13 +992,18 @@ void UIScene_CreateWorldMenu::checkStateAndStartGame()
 
 #endif
 			else
-			{				
+			{
+#ifdef _WINDOWS64
+				// On Windows64, Xbox Live is unavailable. Skip QuadrantSignin and start directly.
+				CreateGame(this, 0);
+#else
 				//ProfileManager.RequestSignInUI(false, false, false, true, false,&CScene_MultiGameCreate::StartGame_SignInReturned, this,ProfileManager.GetPrimaryPad());
 				SignInInfo info;
 				info.Func = &UIScene_CreateWorldMenu::StartGame_SignInReturned;
 				info.lpParam = this;
 				info.requireOnline = m_MoreOptionsParams.bOnlineGame;
 				ui.NavigateToScene(ProfileManager.GetPrimaryPad(),eUIScene_QuadrantSignin,&info);
+#endif
 			}
 		}
 		else
@@ -1355,12 +1360,18 @@ int UIScene_CreateWorldMenu::ConfirmCreateReturned(void *pParam,int iPad,C4JStor
 
 		if(isClientSide && app.IsLocalMultiplayerAvailable())
 		{
+#ifdef _WINDOWS64
+			// On Windows64, Xbox Live is unavailable. Skip QuadrantSignin and start directly.
+			CreateGame(pClass, 0);
+			return 0;
+#else
 			//ProfileManager.RequestSignInUI(false, false, false, true, false,&UIScene_CreateWorldMenu::StartGame_SignInReturned, pClass,ProfileManager.GetPrimaryPad());
 			SignInInfo info;
 			info.Func = &UIScene_CreateWorldMenu::StartGame_SignInReturned;
 			info.lpParam = pClass;
 			info.requireOnline = pClass->m_MoreOptionsParams.bOnlineGame;
 			ui.NavigateToScene(ProfileManager.GetPrimaryPad(),eUIScene_QuadrantSignin,&info);
+#endif
 		}
 		else
 		{