Improve code with std::unique_ptr

[mikee47]

This PR addresses #2616 using the appropriate C++ mechanisms.
Also some tidying.

[what-the-diff]

PR Summary

• Memory management improvements
  Switch to using unique_ptr instead of raw pointers to prevent memory leaks and ease resource management.
• Fix memory leaks in StreamTransformer.cpp
  Address memory leaks, enhancing application stability and performance.
• Simplify and improve CommandOutput.cpp
  Replace a code segment with a more efficient and straightforward approach.
• Refactor Basic_Audio sample application
  Incorporate smart pointers and reorganize some code segments for better code quality and memory safety.

[mikee47]

AI seems to like my PR. My life is complete.

[elfring]

🔮 Can my code review comments matter any more here?

[mikee47]

crystal_ball Can my code review comments matter any more here?

Please feel free to comment, I can always open another PR :-)

[elfring]

Please feel free to comment, …

I am still waiting on more constructive feedback for my previous two code review questions on this issue.