Replace dunst with swaync for fractional scaling support

Dunst lacks wp_fractional_scale_v1, causing jagged font rendering
on external monitors in mixed-DPI setups (laptop 2.5x + externals 1x).
swaync (GTK4) handles fractional scaling natively.

Style based on catppuccin/swaync with Lavender accent.

defaults/xdg/waybar/config

@@ -30,7 +30,7 @@
             "gamemode",
             //"custom/updates",
             "idle_inhibitor",
-            "custom/dnd",
+
             "privacy"
         ]
     },
@@ -202,12 +202,6 @@
         "exec": "waybar-module-pacman-updates",
         "on-click": "alacritty paru"
     },
-    "custom/dnd": {
-        "format": "{}",
-        "exec": "dunstctl is-paused | sed 's/false/󰂚/;s/true/󰂛/'",
-        "interval": 2,
-        "on-click": "dunstctl set-paused toggle"
-    },
     "custom/notification": {
         "tooltip": false,
         "format": "{icon} {}",