feat: add and configure dunst notification daemon

home-manager/i3/default.nix

@@ -104,5 +104,36 @@ in
     };
 
     unclutter.enable = true;
+
+    dunst = {
+      enable = true;
+      settings = {
+        global = {
+          follow = "keyboard";
+          font = "DejaVu Sans Mono 10";
+        };
+
+        urgency_low = {
+          frame_color = "#268bd2";
+          foreground = "#268bd2";
+          background = "#002b36";
+          timeout = 4;
+        };
+
+        urgency_normal = {
+          frame_color = "#859900";
+          foreground = "#859900";
+          background = "#002b36";
+          timeout = 6;
+        };
+
+        urgency_critical = {
+          frame_color = "#dc322f";
+          foreground = "#dc322f";
+          background = "#002b36";
+          timeout = 8;
+        };
+      };
+    };
   };
 }