coursier
update mill to use prebuilt launcher
This updates mill to use the prebuilt launcher (script from github release).
This means that -i or --repl will now work without a separate app for mill-interactive.
It seems to work for me.
@ajrnz I think I'd be fine adding this, but alongside the existing mill app descriptor. So that could be added under a different name, like mill-launcher.
I actually came to dig into the mill stuff because I noticed there was a mill-interactive and a mill. If what @ajrnz has outlined works, then I'd totally be in favor of this since it'd just use the mill launcher to correctly launch Mill exactly how Mill intends it. I'd actually recommend not calling it mill-launcher, but instead just calling it mill since in theory this is how Mill is meant to be used. What's the status of this?
