In Darwin we can have scripts behave like apps.
For example, I have a dedicated "terminal app" that opens nvim in my ~/notes folder. The app closes as soon as I quit nvim.

This is the entirety of the app:

Nvim.app
└── Contents
    └── MacOS
        └── Nvim

Where the Nvim leaf is this script:

#!/bin/sh
/opt/homebrew/bin/wezterm start --cwd ~/notes --workspace notes -- /opt/homebrew/bin/nvim

The only requirement is that the script file name matches the app name: <app-name>.app/Contents/MacOS/<app-name>.

Source:

• [1] https://apple.stackexchange.com/questions/224394/how-to-make-a-mac-os-x-app-with-a-shell-script