Cleanup handler invoked when the extension is deactivated.
This function is called by the VS Code runtime when the extension is deactivated,
such as when the user disables the extension or when VS Code is shutting down.
It is used to perform any necessary cleanup, such as disposing resources or saving state.
Cleanup handler invoked when the extension is deactivated.
This function is called by the VS Code runtime when the extension is deactivated, such as when the user disables the extension or when VS Code is shutting down. It is used to perform any necessary cleanup, such as disposing resources or saving state.