A simple GUI for asdf.

Released binaries are tested on Kubuntu 22.04 and should work on recent Ubuntu versions (and maybe other distros?).

• Copy the latest released binary asdf to a directory on your PATH, for example, ~/.local/bin
• Make sure the binary is executable: chmod a+x ~/.local/bin/asdfg

1. asdfg expects the asdf binary to be located at ~/.asdf/bin/asdf. There's currently no way to override this in the released binaries.