changing wellen to a cargo workspace

[1024bees]

Hey, we talked at latch-up -- I'd like to add python bindings to wellen.

To do this practically, wellen needs to be structured as a cargo workspace, so the python bindings and the rust library can be decoupled -- took a non-invasive, first stab at this in this commit.

[ekiwi]

This looks generally good. Thank you very much!

I do like to keep my directory hierarchy as flat as possible. Could we get rid of the crates directory and put the new wellen folder directly into the repo root?

[1024bees]

sgtm, i've moved it up to repo root

[ekiwi]

Thanks! I will merge this as soon as the CI passes.

[ekiwi]

@1024bees : Please have a look at the CI failures and try to address them. I think this is mostly about some paths that need to be fixed.

Also, please try to address these warnings:

warning: /home/runner/work/wellen/wellen/wellen/Cargo.toml: unused manifest key: package.default-members
warning: /home/runner/work/wellen/wellen/Cargo.toml: unused manifest key: workspace.package.default-members

[1024bees]

woops, sorry about that, fixed the warnings and CI should be working.

With the way workspaces have been implemented (virtual workspaces would be best, IMO), for examples to live in the workspace root, each example needs it's own Cargo.toml file. More context provided at rust-lang/cargo#7467. An example of "expected" examples structure is here: https://github.com/tracel-ai/burn/tree/main/examples

I can do this if you'd prefer -- it might be the better long term structure for examples, but I'm indifferent to it right now. To keep friction low for this MR, examples have been moved into the wellen crate and inputs/ have been symlinked from the workspace root. running examples should be exactly the same as before this MR, if you cd into the wellen crate.

[ekiwi]

@1024bees Have you had time to look into making Python bindings for wellen? I would still be truly interested in making wellen available to python developers because - as you pointed out - there aren't really any good VCD libraries for Python and essentially none for FST or GHW.

[1024bees]

Not yet, I've been a little distracted in life, but I'd like to this and this is good motivation :). I'll look to have a draft up by ~Sunday

[ekiwi]

Not yet, I've been a little distracted in life, but I'd like to this and this is good motivation :). I'll look to have a draft up by ~Sunday

That would be exciting. It is nice to know that you are still working on it.