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/Consoles_App.cpp

@@ -8956,7 +8956,11 @@ bool CMinecraftApp::IsLocalMultiplayerAvailable()
 		if( InputManager.IsPadConnected(i) || ProfileManager.IsSignedIn(i) ) ++connectedControllers;
 	}
 
+#ifdef _WINDOWS64
+	bool available = connectedControllers > 1;
+#else
 	bool available = RenderManager.IsHiDef() && connectedControllers > 1;
+#endif
 
 #ifdef __ORBIS__
 	// Check for remote play