Build and usuability improvements, Pi binary
- Build: Remove call to Set_Monospace in Gui so GtkAda v21 still works
- Build: Reintroduce non-Alire build config
- Docs: Update README.md to include non-Alire build
- Usability: Add more info to message when Telnet fails to connect
Added Raspberry OS armhf
(32-bit) binary to release - please test it!