0.6.0 release

New features:
- add after_cmds to run tests
- Run bitbake -e separately and allow it to fail

Bug fixes:

Documentation updates:

Container images:

- dockerfiles: Add git-lfs package
- dockerfiles/debian-bullseye/Dockerfile: sort packages
- dockerfiles/debian-bullseye/Dockerfile: remove duplicated python3 package
- dockerfiles/debian-bullseye/Dockerfile: add procps
- dockerfiles/ubuntu-22.04/Dockerfile: sort package list
- dockerfiles/ubuntu-22.04/Dockerfile: add missing pexpect dependency