Settings overrides are still relative to library location

I can no longer do without this because SDCs cannot designate their own manifest path as far as I can tell.

I've had to find another way to support SDCs in my project. I've created an MR to show this functionality though as I still think it is better that an override is absolute rather than relative.

Perhaps this could be closed in favor of ✨ Add support for using vite from the root of the project Active ?
I'm working in there on adding general support for using Vite outside the theme/module directory, including but not limited to project root. I'm still working on tests, but there's already a working implementation that can be tested.

That approach works for me 😊