Include nix-search-tv module and add it to home imports
Add `nsf` alias for interactive package search with nix-search-tv
Enable fish completions generation
Comment out the previously allowed insecure packages list
* Rename `nooctalia-plugins` to `noctalia-plugins` in host modules and
plugin definitions
* Update Hyprland keybindings and exec-once to use the new `noctalia`
commands
* Add `stylixImage` option and enable pointer cursor in
`modules/core/user.nix`
* Introduce `modules/home/nixpkgs.nix` to allow unfree packages and
insecure Electron
* Add full Noctalia configuration module with settings for audio,
bar, calendar, location, notifications, plugins, shell, wallpaper,
and widgets
* Enable `noctalia` in `modules/home/stylix.nix` and replace legacy
`noctalia-shell` imports in `modules/home/default.nix`