Stop streaming music (jukebox) when the player changes dimensions so music disc sounds from the overworld cannot be heard in the nether or vice versa.
Previously, the streaming audio continued playing at its original world coordinates even after a dimension change, causing the sound to leak into the new dimension at the same position.
Fixes#411
Fixes a Win64 multiplayer issue where player data (`players/*.dat`) could be mismatched because identity was effectively tied to connection-order `smallId` XUIDs.
Introduces a deterministic username-derived persistent XUID and integrates it into the existing XUID-based save pipeline.
- Added `Windows64_NameXuid` for deterministic `name -> persistent xuid` resolution
- On Win64 login (`PlayerList`), set `ServerPlayer::xuid` from username-based resolver
- Aligned local player `xuid` assignment (`Minecraft`) for create/init/respawn paths to use the same resolver
- Added Win64 local-self guard in `ClientConnection::handleAddPlayer` using name match to avoid duplicate local remote-player creation
- Kept `IQNet::GetPlayerByXuid` compatibility fallback behavior, while extending lookup to also resolve username-based XUIDs
- Moved implementation to `Minecraft.Client/Windows64/Windows64_NameXuid.h`; kept legacy `Win64NameXuid.h` as compatibility include
Rename migration is intentionally out of scope (same-name identity only).
- 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
