Moved code into src folder. Added build for component library.

src/components/common/HoverTooltip.js

@@ -0,0 +1,27 @@
+import { useEffect, useState } from 'react';
+import { Tooltip } from 'react-basics';
+import styles from './HoverTooltip.module.css';
+
+export function HoverTooltip({ children }) {
+  const [position, setPosition] = useState({ x: -1000, y: -1000 });
+
+  useEffect(() => {
+    const handler = e => {
+      setPosition({ x: e.clientX, y: e.clientY });
+    };
+
+    document.addEventListener('mousemove', handler);
+
+    return () => {
+      document.removeEventListener('mousemove', handler);
+    };
+  }, []);
+
+  return (
+    <Tooltip className={styles.tooltip} style={{ left: position.x, top: position.y }}>
+      {children}
+    </Tooltip>
+  );
+}
+
+export default HoverTooltip;