Add Badge component for displaying badges

src/components/Badge.js

@@ -0,0 +1,6 @@
+import { $html } from "sigpro";
+import { joinClass } from "../core/utils.js";
+
+/** BADGE */
+export const Badge = (props, children) => 
+  $html("span", { ...props, class: joinClass("badge", props.class) }, children);