✨ feat: add on-screen display for volume and brightness

main.css

@@ -4,6 +4,7 @@
 @import url("./styles/dock.css");
 @import url("./styles/switcher.css");
 @import url("./styles/launcher.css");
+@import url("./styles/osd.css");
 
 * {
   all: unset;