Extending Flatcar: Say 'Goodbye' to torcx and 'Hello' to systemd-sysext

Flatcar is a minimal, immutable, image-based operating system for fully automated, zero-touch container infrastructure. It ships the bare minimum required for running containers at scale - and usually, the answer to questions like “how do I install tool XYZ on Flatcar?” is: “run it in a container”. Sometimes though, “tool XYZ” needs to operate close to the OS itself, and it’s not feasible (or even