Release v1.0

This is a version of imitation, that we are happy to publicly announce.

This includes:

• A decent API
• A decent CLI interface (not part of SemVer/not stable/might change within the v1.x cycle)
• User Friendly Documentation
• Being able to replicate algorithm performance
• Compatibility with gymnasium

This for now does not include:

• Official support for custom environments
• A CLI based on Hydra
• Official support for preference comparisons
• Refactored Reward Networks