Updated list of demos and detailed info

[Daniel Monteiro]

Hello everyone,

As part of my effort to become a better OpenGL and Vulkan developer,
I've been reading through (and experimenting with) the Mesa Demos.

During this process, I noticed that some of the demos don't run under
certain conditions. I'd like to catalogue these cases and, if
possible, document the requirements and runtime conditions for each
demo.

Would there be interest in such a catalogue? I could also include
screenshots where appropriate.

I'm aware this is a large task (I counted 531 binaries after
building), and I'm doing it regardless. But if there's interest in
hosting or linking to this documentation, I’d be happy to put in extra
effort and be more thorough.

PS: Regardless of hosting, do you have any suggestions on how I should
approach this? I'd really appreciate any advice.

Best regards,
Daniel "MontyOnTheRun" Monteiro