0.0.99.2

Overview of changes

• Add nano-default-editor to the fedora-toolbox images
• Add unit tests for pkg/shell
• Connect Go unit tests to Meson & rename CI job
• Decouple image caching from Zuul for the system tests
• Don't assume that the user's GID is the same as the UID
• Don't require /etc/machine-id in toolbox images
• Drop ShellCheck on Shell Toolbox
• Give access to systemd-resolved's Varlink socket
• Optimize 'enter' and 'run' in the non-fallback case
• Optimize the performance of 'list'
• Properly separate builddir setup & build in the Ansible playbooks
• Rename Dockerfile to Containerfile for the fedora-toolbox images
• Show test execution time for the system tests
• Support listing images without names
• Unbreak 'create' on an unlocked OSTree deployment
• Unbreak 'create' on CoreOS with read-only /boot
• Update default release to 33 for non-Fedora hosts
• Update the GitHub issue templates
• Use a regular file, not a symbolic link, for the README.md in the
  fedora-toolbox images
• Fall back to $HOME when using a container if the current working directory
  isn't present in it
• Various updates to the Bash completion
• Various updates to the manuals