Generate stream metadata from release information

[castrojo]

• https://builds.coreos.fedoraproject.org/streams/stable.json
• https://github.com/coreos/fedora-coreos-stream-generator

CoreOS and Flatcar generate json feeds of their release data. This lets them take that information and present it to users: Here's the coreOS one:

And here's the Flatcar one, which is the example I'll be using:

So I'm thinking we generate this json as part of an action, and then shove that into cloudflare. Then the websites can just consume it, or we could show that info in a cli program, or whatever we want to come up with. We should also be able to pass along an array of packages to the thing so that each flavor can display whatever is important to them.

Here's a made up example for Bluefin:

GTS	Stable	Latest
Fedora: 40.20240602.3.0	Fedora: 40.20240602.3.0	Fedora: 40.20240602.3.0
Linux: 6.8.11.200.fc39	Linux: 6.9.15.300.fc39	Linux: 6.8.20.200.fc39
GNOME: 45.2	GNOME: 46.0	GNOME: 46.0
systemd: 255	systemd: 256	systemd: 256

Mesa,nvidia, etc. And since it's part of the build step Bazzite could add HHD version, gamescope version, etc. And then custom images can add whatever package version is important to them.