Update OcuFix to Beat Saber 1.39.1 compatibility

[lyyQwQ]

Major changes:

• Updated to SDK-style project format (removed AssemblyInfo.cs)
• Integrated Zenject/SiraUtil for dependency injection
• Fixed BSMLSettings registration timing issue
• Updated all dependencies to latest versions
• Modernized version management (now fully controlled by manifest.json)

Technical improvements:

• Upgraded BeatSaberModdingTools.Tasks to 2.0.0-beta7
• Added proper scene change detection for settings menu
• Fixed XRSettings detection for Quest 3 compatibility
• Cleaned up project structure to match modern Beat Saber mods