Add JS docs

packages/block-editor/src/components/rich-text/toolbar-button.js

@@ -4,6 +4,35 @@
 import { Fill, ToolbarButton } from '@wordpress/components';
 import { displayShortcut } from '@wordpress/keycodes';
 
+/**
+ * RichTextToolbarButton component displays a button in the rich text toolbar.
+ *
+ * @param {Object} props                   The component props.
+ * @param {string} props.name              Name of the button.
+ * @param {string} props.shortcutType      Type of the shortcut.
+ * @param {string} props.shortcutCharacter Character of the shortcut.
+ * @param {Object} props.props             Props to pass to the `ToolbarButton` component.
+ *
+ * @return {Element} The toolbar button element.
+ *
+ * @example
+ * ```jsx
+ * function MyRichTextToolbarButton() {
+ * 	return (
+ * 		<RichTextToolbarButton
+ * 			name="my-button"
+ * 			icon={ icon }
+ * 			title="My button"
+ * 			onClick={ () => {
+ * 				console.log( 'Button clicked!' );
+ * 			}
+ *         shortCutType="primary"
+ *         shortCutCharacter="b"
+ * 		/>
+ * );
+ * }
+ * ```
+ */
 export function RichTextToolbarButton( {
 	name,
 	shortcutType,