Code improvements

[smitdylan2001]

Following code improvements:

• Remove blank Unity callbacks
• Combine .position and .rotation into .SetPositionAndRotation for better performance
• Use tuplet for swapping values
• Change Vector calculations for better performance
• Use TryGetComponent to have less memory allocations when no component is present
• Convert if-else to single return for performance
• Put together 2 strings for better performance and less garbage allocations
• Use SetPixels32 instead of SetPixels for better performance and lower memory usage
• Reuse collision callbacks for lower garbage allocation