Add project maintainers metadata

[wayyoungboy]

Fixes #2868.

Summary

• add the project maintainers metadata field to pyproject.toml using the existing public project contact

Tests

• Python tomllib assertion for project.maintainers
• git diff --check -- pyproject.toml

[CoolCat467]

This screams LLM tooling to me. First off not sure if this is necessary as it just mirrors the "authors" field as is and even if we made a more comprehensive list it's sure to fall out of date. And really, I don't know why it would be necessary to have a list like this anyways. If you need to contact maintainers, just make a github issue or use the messaging systems the contributors file talks about. I'd be interested in hearing thoughts about this, but if there are LLM responses I'm closing this.

On another note, test failures seem to stem from a codecov issue I haven't seen before, we should look into this.

[A5rocks]

Looks like we might need to bump the version for codecov/codecov-action: codecov/codecov-action#1956