feat(Modal Component): add prop types

packages/controls/js/libs/modal/index.js

@@ -1,17 +1,29 @@
+//@flow
+
 /**
- * WordPress dependencies
+ * External dependencies
  */
+import type { MixedElement } from 'react';
 import { __ } from '@wordpress/i18n';
 import { Modal as WPModal } from '@wordpress/components';
+
+/**
+ * Blockera dependencies
+ */
 import { componentClassNames } from '@blockera/classnames';
 
+/**
+ * Internal dependencies
+ */
+import type { ModalProps } from './type';
+
 export default function Modal({
 	children,
 	headerIcon,
 	headerTitle,
 	className,
 	...props
-}) {
+}: ModalProps): MixedElement {
 	return (
 		<WPModal
 			className={componentClassNames('modal', className)}

packages/controls/js/libs/modal/type/index.js

@@ -0,0 +1,12 @@
+//@flow
+
+export type ModalProps = {
+	children?: any,
+	visible?: boolean,
+	onClose?: () => void,
+	onRequestClose?: () => void,
+	headerIcon?: any,
+	headerTitle?: string,
+	className?: string,
+	size?: 'small' | 'medium' | 'large' | 'fill',
+};