refactor(flake-parts): initial flake-parts configuration

inputs/home/modules/desktop/wayland/windowManager/hyprland/pkgs/hyprvolume.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "hyprvolume";
+  runtimeInputs = with pkgs; [pamixer libnotify];
+  text = ''
+    if [ "$1" == "up" ]; then
+      pamixer --increase 5
+    elif [ "$1" == "down" ]; then
+      pamixer --decrease 5
+    elif [ "$1" == "mute" ]; then
+      pamixer --toggle-mute
+    fi
+
+    VOLUME=$(pamixer --get-volume-human)
+
+    notify-send --app-name="system-notify" -h string:x-canonical-private-synchronous:sys-notify "󰕾 $VOLUME"
+  '';
+}