feat(waybar): add backlight module

dots/.config/waybar/config

@@ -20,6 +20,7 @@
         "modules-right": [
             "custom/pacman-update",
             "tray",
+            "backlight",
             "network",
             "clock",
             "custom/lock"
@@ -98,6 +99,10 @@
             "interval": "once",
             "on-click": "swaylock"
         },
+        "backlight": {
+            "format": "󰃠 {percent}%",
+            "scroll-step": 5.0
+        },
         "network": {
             "on-click-right": "~/.config/waybar/scripts/set-rfkill.bash",
             "interval": 1,

dots/.config/waybar/style.css

@@ -70,6 +70,7 @@ tooltip label,
 #custom-pacman-update,
 #taskbar,
 #tray,
+#backlight,
 #tray menu,
 #custom-lock {
   background-color: #16161d;
@@ -249,7 +250,7 @@ tooltip {
   );
   background-size: 400% 400%;
   /* PERF: Animations in gtk css cause incredible CPU loads, wtf?!
-  * Disabling this shit for now, not worth the CPU cost. */
+  *  Disabling this shit for now, not worth the CPU cost. */
   /* animation: gradient_roll 30s ease-in-out infinite; */
 }
 
@@ -272,6 +273,11 @@ tooltip {
   -gtk-icon-shadow: none;
 }
 
+/* Backlight */
+#backlight {
+  color: #DCA561;
+}
+
 /* Network */
 #network {
   color: #a3d4d5;