Alright, just took it for a spin in a GitHub codespace instance as to not fuck up my local setup (like usual ahaha). Looks all good to me! I stumbled on an error where access to the config env_file wasn't updated, and took the freedom to fix it and push to your branch (see my commit). With this:

$ aiida-project init (for bash)
$ aiida-project create test
$ cda (after source ~/.bashrc)
$ aiida-project destroy test

all worked fine.