added xs small button variant

Author: niemyjski

src/Exceptionless.Web/ClientApp/src/lib/features/shared/components/ui/button/button.svelte

@@ -18,6 +18,7 @@
 			},
 			size: {
 				default: "h-9 px-4 py-2",
+				xs: "h-6 rounded-md px-1 text-xs",
 				sm: "h-8 rounded-md px-3 text-xs",
 				lg: "h-10 rounded-md px-8",
 				icon: "h-9 w-9",