Use walkDirRec for nimble test, output to build/tests

[LiamDobbelaere]

This is not meant to be added into master directly, there's probably a lot wrong with this code style-wise but it works for me. Sorry about the whitespace, I do use nimpretty so maybe the original file wasn't formatted?

It serves as an illustration to this issue: #849

This is how I expected nimble test to actually work, not whatever it is doing now.

[genotrance]

CI is failing since this functionality is explicitly disabled - see tests/testCommand/testsIgnore.

Best to wait for @dom96 to confirm why this is not supported. It might very well be a breaking change but seems like a reasonable ask as well.

[LiamDobbelaere]

Thanks, don't mean to be a bother. I was just starting a project in Nim and this particular thing just bothered me is all.

[dom96]

What's the status of this? Can we get those formatting changes removed?

[dom96]

ping