Description:
    Generate a one-off or general purpose script, such as a data migration
    script, cleanup script, etc.

Example:
    `bin/rails generate script my_script`

    This will create:
        script/my_script.rb

    You can run the script using:
        `ruby script/my_script.rb`

    You can specify a folder:
        `bin/rails generate script cleanup/my_script`

    This will create:
        script/cleanup/my_script.rb
