feat: Implemented async I/O

[ItsIgnacioPortal]

This PR implements asynchronous I/O

• If this PR added new features to the proyect, I've also updated the documentation.
• I am not making a pull request to fix a security vulnerability. I understand that all security vulnerabilities must be handled according to the Security Policy.
• I have added relevant unit-tests to the main_test.go file.

This PR fixes/resolves/closes #29

[ItsIgnacioPortal]

In all benchmark tests the performance improvement has been negligible. However, there's evidence of a 50% reduction in RAM usage. Implementation is considered a success.