Add project section to pyproject.toml
hey @pstjohn, adding support for `uv` should be fine, but this PR has 1300 and 8 changed file - I guess your auto-formatter ran across the whole repo. While such a refactoring PR will most likely come in future - would you mind separating the actual Pyproject.toml change out of this PR? 

Let's handle refactoring and pyproject in separate PRs to make triaging easier in case something breaks Huh - that's super odd, I don't remember making those commits 😆 . Yeah agreed, I'm not intending to make any formatting suggestions.

**edit**: I think those came from the `reformat_with_isort_and_black`, I must have made a change that caused it to reformat the entire repo. Looks like it's happy with the reduced set of changes now Completes: https://jirasw.nvidia.com/browse/CDISCOVERY-4417
# What does this PR do ?

In bionemo we're exploring using [`uv`](https://docs.astral.sh/uv/) to handle pinning pypi dependencies in our docker builds. For this to work, we'll need to modernize some of the packaging for NeMo and mcore by adding `project` sections to their pyproject.toml files.

**Collection**: all

# Changelog 
- Adds a [package] section to the pyproject.toml file.

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