Checks if YouTube Music is open.
This extension is related to the YouTube Music project I created on my GitHub page (https://github.com/iXenonN). Since YouTube Music does not have a desktop application for computers, the extension sends the status of whether the application is running in the background to the Flask server in the main Python code of my GitHub project. Based on this status, it creates a variable that changes the UI state in the readme.md file on GitHub.