Add AppImage packaging for Yakut

Hello! I've been looking at ways of reducing the complexity of the install of Yakut and reducing the variance in the combination of Python/Yakut/dependencies for users within my organization. I've been playing with AppImage packaging and have been bundling a specific Python version, Yakut, deps, and our DSDL so that installing and being able to interact with our Cyphal nodes is as simple as grabbing the single file and running it in a terminal.

So far I've found that packaging Yukut on Ubuntu 20.04 for use on Ubuntu 20.04/22.04 is fairly simple. Packaging for use on a wider range of Linux platforms (e.g. those with older glibc etc than Ubuntu 20.04's) is trickier.

I think that including the build of an AppImage into the Yakut CI here, so that it can be downloaded from GitHub would be very useful for many consumers.

While such a build may not be able to take advantage of the deeper integration by including vendor-specific DSDL, or hardcoding the configuration of e.g. CAN interfaces, it would certainly reduce the surface area of versions of dependencies that a majority of users would experience and hopefully provide a useful "does the AppImage work for you?" response to troubleshooting questions.

Happy to discuss further and contribute my work so far.

Start by reviewing the Yakut CI configuration and the current Python/Yakut dependency packaging described in the issue. Define the supported Linux and glibc range, then verify that CI produces a downloadable AppImage that runs on the documented platforms.