Racker changelog

in progress

Increase resources assigned to Vagrant environment. Now, it gets 4 VCPUs and 4096 MB RAM.
Improve platform guards and naming things
Improve central command invocation function
Improve documentation
Fix packaging

Add ImageProvider implementation to provision operating system images
Add resources and documentation for sandbox setup based on Vagrant
Supported operating systems: Debian, Ubuntu, Fedora, openSUSE, Arch Linux, CentOS, Rocky Linux, Amazon Linux, Oracle Linux
Add basic probing for unit systemd-journald
Add example probe implementation for the Apache web server
Add postroj pkgprobe implementation
Add postroj list-images subcommand
Add caching of download artefacts
Improve robustness and documentation
Add subcommand postroj pull [--all]
Add subcommand postroj selftest {hostnamectl,pkgprobe}
Improve process management of container wrapper
Generalize process wrapper for launching Nspawn containers
Add subcommand postroj run
Fix stty: 'standard input': Inappropriate ioctl for device
Refactor application settings
Add software test framework and basic tests for postroj run
Refactor data model for curated operating systems / disk images
Allow versionname labels like debian-11 for addressing curated filesystem images
Rename project to Racker and Python package to racker