[Proposal] Moving `configclass` decorator to PyPI package

[Mayankm96]

Proposal

Dataclasses from Python are great but have their limitations. We made our own decorator around dataclass for our usage. This makes it easier to do config management. Since this concept is generally useful, we should move it to its own PyPI package. Doing this allows us to use it in other dependencies such as rsl-rl.

Checklist

• [x] I have checked that there is no similar issue in the repo (required)

Acceptance Criteria

• [ ] Take configclass out of orbit.utils and make a separate repo that publishes to PyPI
• [ ] Fix all the imports such that everything works