Sort root Meson files by number of path components

[tristan957]

Previous implementation was way too naive.

[xclaesse]

I think we should instead merge #195. It also fix that function, and the advantage is it does not need to glob the whole directory, in the most common case you just need to check existence in the root directory.

[wolfpld]

Note that I have also privately rebased #188 on top of #195, assuming that this is the way forward to continue the work. Can we agree on how to move this forward?

[tristan957]

Let's move forward with #195, but I don't think it is the future of the extension. I think we really just need proper multi-root workspace support.

[tristan957]

I am going to submit a bug fix release, and I would like to just merge this since it is a bug fix outside of #195. Is that fine with everybody?

[tristan957]

Alternative @xclaesse could split his fix out into a separate PR that I can merge.

[wolfpld]

Is that fine with everybody?

It's basically what I'm also doing, so yes.

[tristan957]

Is that fine with everybody?

It's basically what I'm also doing, so yes.

@wolfpld definitely didn't want to steal your thunder, just didn't think it was the right place for the fix. Opened this PR is a haste to get a bug fix out, but obviously haven't merged it.