Render and Save Script v3.0

In this code, a new directory called 'rendered_script' will be created within the output folder, and the Nuke script will be saved in that directory as a separate file with the same name. The code handles the creation of the directory if it doesn't exist. Please replace the previous code with this in your menu.py file. The 'Render and Save Script' button will now save the Nuke script as a separate file in the 'rendered_script' directory within the output folder.