Staged-recipes: Add pre-commit to conda-forge

[sodre]

https://pre-commit.com

I am mostly keeping track of the package request.

[justcalamari]

I'm testing that pinging @conda-forge/staged-recipes works

[CJ-Wright]

@jtratner could you try pinging staged here?

[asottile]

I don't know anything about conda, but is this what you're looking for? https://github.com/conda-forge/pre_commit-feedstock CC @nicoddemus

[sodre]

Yes! Thank you!