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

[in0finite]

Sorry, but I don't have the time to review "refactoring" PRs. If you want to contribute to the project, then please focus on implementing some of the features.

Btw, I took a quick look at the PR, and it doesn't seem to bring any major performance improvements.

[smitdylan2001]

While I understand, I do suggest to check these points when new commits/PRs come in. While not mattering much now, over time these can cause real performance issues