* feat(nix): add flake package, NixOS and Home Manager modules
Add a flake.nix plus packaging/nix derivations so Nix and NixOS users can
run and install Vocalinux declaratively, including via Home Manager.
- package.nix: buildPythonApplication with GTK3, libayatana-appindicator,
IBus and libnotify typelibs; wraps the entry point with every host tool
the injectors probe for (xdotool, wtype, ydotool, wl-clipboard, xclip,
xsel, xprop, setxkbmap, ibus, gdbus, notify-send, paplay, aplay)
- pywhispercpp.nix: builds pywhispercpp from its vendored PyPI sdist
(absent from nixpkgs, same gap as Debian/Fedora), static whisper.cpp,
GGML_NATIVE=OFF for a portable baseline
- module.nix: NixOS module enabling hardware.uinput and installing the
package; input/uinput group membership stays a per-user choice
- home-manager.nix: programs.vocalinux.enable installs into the profile
- docs/INSTALL.md gains a Nix / NixOS section; packaging/nix/README.md
carries the usage snippets
Refs #931
* fix(nix): address review findings on imports check and docs
- pywhispercpp: check pywhispercpp.model and _pywhispercpp too, so the
compiled binding is proven loadable, not just the package
- README Home Manager example: declare the nixpkgs/home-manager inputs
and pass pkgs, which homeManagerConfiguration requires
- package.nix: use top-level xprop/setxkbmap attrs (xorg.* is deprecated)
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Co-authored-by: Jatin K Malik <jatinkrmalik@gmail.com>
