GUI: Linux: Stop wrapping the desktop graphical interface inside an AppImage

[yveszoundi]

Background

As of now, the Linux GUI artifact is an AppImage file. This is achieved with linuxdeploy. The original goal was creating a fully self-contained binary, but this was never done properly (time constraints and current AppImage knowledge).

Request

Do not create an AppImage file for the GUI, as most of the dependencies are not currently embedded anyway.

• It complicates the build
• Fuse related issues
  • It may create dependency problems in certain distributions (FUSE related dependencies: i.e., fuse2 vs fuse3 vs fuse).
  • If the fuse libraries are not resolved, the program will silently failed to start without notice, but that's a general problem.
• It doesn't "naturally" support musl .

Anticipated changes

• This will impact local build scripts and the GitHub actions workflow.
• README files included in zip or tar release artifacts should be updated accordingly
• fuse should be removed as a dependency from any rpm spec file or deb control file.

[yveszoundi]

See commit https://github.com/rimerosolutions/entrusted/commit/6077a664dcacd89078381baaad02a6483b523b9a for build scripts and such