Add Tooltip component

Implement Tooltip component for displaying tips.

src/components/Tooltip.js

@@ -0,0 +1,6 @@
+import { $html } from "sigpro";
+import { joinClass } from "../core/utils.js";
+
+/** TOOLTIP */
+export const Tooltip = (props, children) =>
+  $html("div", { ...props, class: joinClass("tooltip", props.class), "data-tip": props.tip }, children);