4.0.0

• 48c750e Add support for IMEX channels in hook 98-nvidia.sh
• 29541a8 Change port range used by PyTorch hook
• f380b11 Accept the "IMAGE:TAG@DIGEST" format supported by docker
• 4d843dc Add support for zstd compressed layers
• 38c72fd Add scripts to generate all release artifacts
• aee58af Remove support for MELLANOX_MOUNT_DRIVER in hook 99-mellanox.sh
• 5a4c700 Remove sharpd handling from hook 50-sharp.sh
• d7b3401 Increase maxdepth in common::fixperms
• dba4f81 Add "enroot digest" to print the hash of a registry image
• ebb585b Add "enroot info" to print information about enroot
• 574722f Add enroot export to usage doc example
• f29a45c Improve handling of docker-style URI
• 0b92ce3 Introduce "enroot load" to skip the squashfs step with unprivileged overlayfs
• c4fd5e7 Fix issues with vanishing PIDs when calling "enroot list -f"
• 1cebc0c [build] Fix arch detection (#214)
• 2bd5143 Do not recursively remove the target of bundle/export --force
• 09ae4b2 Fix uint32 uid issue #195 (#197)