add support for fairchem

[alinelena]

meta has their own model https://github.com/FAIR-Chem/fairchem

[ElliottKasoar]

If we do want to add specific revisions in a sub-package, I don't know exactly how it'll end up in the pyproject.toml, but you can add it with (replacing main):

uv add git+https://github.com/FAIR-Chem/fairchem#subdirectory=packages/fairchem-core --rev main

[ElliottKasoar]

I also wonder if we'll need something like: astral-sh/uv#11153, since it looks like the override is applied globally, and what we actually need is to override fairchem's torch limits specifically.

(For context, fairchem "requires" torch==2.4, which will conflict with chgnet==0.4.0 but it seems to work with 2.5.1)

Ah, we can also manually specify the metadata: https://docs.astral.sh/uv/concepts/resolution/#dependency-metadata

See also: astral-sh/uv#2686