docs: add 3DBallHard to the release_23 provenance list

docs: document the restored Crawler environment (card + NOTICE)

docs(card): correct DungeonEscape policy status and 3DBallHard ONNX input contract

Remove Crawler environment and related documentation

fix(card): set viewer:false (Unity binary builds, no tabular viewer)

Document 3DBallHard release-23 artifacts

Document Pyramids, Worm, and Walker release-23 artifacts

Document Crawler and PushBlock release-23 artifacts

Document SoccerTwos release-23 environment

Document DungeonEscape release-23 environment

Document DungeonEscape release-23 environment

docs: add PushBlock

Retract PushBlockWithInput environment

Clarify PushBlock ONNX naming

docs: add 3DBallHard

README: restructure for multiple environments; add PushBlockWithInput

Card: link the GitHub collection & measurement recipe

Add model/dataset card and license

initial commit