Dashboard to check what releases are available for each architecture

[chapulina]

As we have more libraries to release, it becomes harder to keep track of which binary releases went through for each architecture combination. It would be helpful to have a live dashboard which displays:

• Whether a library's major version is available for a given OS + arch combination
• If available, what's the latest version number

I think that would look a bit like the ROS status pages:

http://repositories.ros.org/status_page/ros_noetic_default.html

While tracking the Dome release, I created a simple script that gets the job partially done, but there's a lot still hardcoded in it. It also needs to be run locally, which is less convenient than a web page.

This is what the results look like:

[chapulina]

See #426

[j-rivero]

We should find a way of including which builds are disabled by .releasepy_NO_* which is present in -release repositories.

[chapulina]

For the terminal dashboard, the easiest way is to hardcode it 😕