Custom script in sidebar contextual menu

Hello,

I would like to add a shell script to the project sidebar contextual menu.

Optimally, I'd like to have the script run on the directory selected.

My goal would be to right click a directory, choose my custom script, and have that script create child directories and files (thus saving me from having to manually do it).

Any tips on how to do this? Or, any advice for how to get a "global" shell (or otherwise) script to run on directory chosen?