DEV - Add CI action to check for deps consistency

[trallard]

We need to make sure the project.toml and environment.yaml files in this repo are always aligned/in sync to avoid divergence.

I am afraid that without a CI step that checks for this cross-file consistency, things will go out of sync eventually.

Originally posted by @jaimergp in #801 (comment)

[peytondmurray]

What are your thoughts about making this a pre-commit check? We'd target conda-store-server/pyproject.toml, .python-version-default, and conda-store-server/environment-dev.yaml, right?