Add Noctalia shell with Quickshell overview

- Add `noctalia` input to flake and lock it in `flake.lock`.
- Include `noctalia` and `quickshell` modules in `flake.nix`.
- Extend core packages to accept `inputs` and `system`; add
  `quickshell.nix`
  with required Qt6 packages and environment variables.
- Enable `upower` service for battery handling.
- Add home modules `noctalia.nix` and `overview.nix` (QML UI, README,
  assets, widgets, services) to provide a workspace overview.
- Comment out unused rofi and web‑search binds; update `exec‑once` to
  start
  the overview daemon and `noctalia-shell`.
- Provide `restart.noctalia` script and its Nix wrapper.
- Enable `noctalia-shell` in `stylix` configuration.

modules/home/hyprland/exec-once.nix

@@ -10,13 +10,19 @@ in {
     "dbus-update-activation-environment --all --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP"
     "systemctl --user import-environment WAYLAND_DISPLAY XDG_CURRENT_DESKTOP"
     "systemctl --user start hyprpolkitagent"
+    "qs -c overview" # Start quickshell-overview daemon
 
-    "killall -q swww;sleep .5 && swww-daemon"
-    "killall -q waybar;sleep .5 && waybar"
-    "killall -q swaync;sleep .5 && swaync"
-    "#wallsetter &"
-    "pypr &"
-    "nm-applet --indicator"
-    "sleep 1.0 && swww img ${stylixImage}"
+    # "killall -q swww;sleep .5 && swww-daemon"
+    # "killall -q waybar;sleep .5 && waybar"
+    # "killall -q swaync;sleep .5 && swaync"
+    # "#wallsetter &"
+    # "pypr &"
+    # "nm-applet --indicator"
+    # "sleep 1.0 && swww img ${stylixImage}"
+    "killall -q waybar"
+    "pkill waybar"
+    "killall -q swaync"
+    "pkill swaync"
+    "noctalia-shell &"
   ];
 }