feat: Clean up after abortion (Ctrl + c)

[jcs090218]

A few commands create files/folders; it is better to delete them if the command was aborted. 🤔

Commands that should be handled:

• eask create package <name>
• eask create elpa <name>

Clean up the cloned folder; if <name> is a point to the current . directory, it should delete every generated file under the current directory.