v7.0.0: Collision observations in sim

[stephane-caron]

This release adds collision observations to simulation environments, pixi-pack integration and additional unit tests. It is a major release as get_reward functions have been removed from all Gymnasium environments. Otherwise comes a regular batch of fixes and additions to the documentation.

Thanks to @Tordjx for contributing to this release 👍

Added

• Add pixi-pack integration
• actuation: Add collision-with-environment observation (thanks to @Tordjx)
• docs: Start Kinematics page
• utils: Add clear_shared_memory utility function

Changed

• Bazel: Treat warnings as errors (except the one we can't avoid)
• Minimum Python version is now 3.9
• envs: Observation-based reward wrapper
• envs: Unit test for the base step function
• examples: Group simulation-related examples in a sub-directory

Fixed

• Bazel: Ignore .pixi directory as it can contain unrelated Bazel files
• Fix unused variable warning in Bullet interface

Removed

• Breaking: Remove get_reward functions from all environments
• Makefile: Remove conda packing rules, now deprecated in favor of pixi

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This discussion was created from the release v7.0.0.