Adds example on Hydra integration for running environments

[Mayankm96]

Description

This PR adds a method to register the environment configuration instance as a Hydra configuration object. Doing so allows configuring a bunch of environment parameters from the command line. It finally gets around the main motivation to use configclass decorator.

python source/standalone/environments/zero_agent.py --task Isaac-Lift-Franka-v0 --headless env.num_envs=2

Fixes #57

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Screenshots

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Checklist

• [x] I have run the pre-commit checks with ./orbit.sh --format
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have updated the changelog and the corresponding version in the extension's config/extension.toml file