Add missing pywhispercpp build prerequisites (libssl-dev, autoconf,
automake, libtool, patchelf) to both Debian and Ubuntu apt package lists.
These are not pulled in transitively on clean Debian installs and cause
CMake bootstrap failures during source compilation.
Add runtime smoke test for pywhispercpp to verify_installation() so
"installs but does not run" failures surface at install time with
actionable diagnostic steps instead of silently at first launch.
Treat Debian as a first-class target — remove the "primarily designed for
Ubuntu" warning for Debian systems. Remain conservative for non-Debian,
non-Ubuntu distros.
Add DEBIAN_FRONTEND=noninteractive to all apt install commands to prevent
interactive debconf prompts from blocking unattended installs.
Improve ydotool failure messaging on Debian with compile-from-source
instructions since ydotool is not packaged in Debian standard repos.
Add Debian-specific troubleshooting section to DISTRO_COMPATIBILITY.md
covering build deps, ydotool compilation, scoped source builds, and
libwhisper.so resolution diagnostics.
References: https://medium.com/@cslev/talking-to-my-linux-box-without-talking-to-the-cloud-vocalinux-on-debian-without-the-tears-10bf053ea21b
