refactor: Improve typings for element-ui imports (no-changelog) (#4678)

* convert all stories to typescript

* stricter typing for element-ui imports

packages/design-system/src/components/N8nMenuItem/MenuItem.stories.ts

@@ -1,5 +1,5 @@
 import N8nMenuItem from '.';
-import ElMenu from 'element-ui/lib/menu';
+import { Menu as ElMenu } from 'element-ui';
 import type { StoryFn } from '@storybook/vue';
 
 export default {
@@ -10,7 +10,7 @@ export default {
 const template: StoryFn = (args, { argTypes }) => ({
 	props: Object.keys(argTypes),
 	components: {
-		ElMenu, // eslint-disable-line @typescript-eslint/no-unsafe-assignment
+		ElMenu,
 		N8nMenuItem,
 	},
 	template: `

packages/design-system/src/components/N8nMenuItem/MenuItem.vue

@@ -71,8 +71,7 @@
 </template>
 
 <script lang="ts">
-import ElSubmenu from 'element-ui/lib/submenu';
-import ElMenuItem from 'element-ui/lib/menu-item';
+import { Submenu as ElSubmenu, MenuItem as ElMenuItem } from 'element-ui';
 import N8nTooltip from '../N8nTooltip';
 import N8nIcon from '../N8nIcon';
 import { IMenuItem } from '../../types';
@@ -81,8 +80,8 @@ import Vue, { PropType } from 'vue';
 export default Vue.extend({
 	name: 'n8n-menu-item',
 	components: {
-		ElSubmenu, // eslint-disable-line @typescript-eslint/no-unsafe-assignment
-		ElMenuItem, // eslint-disable-line @typescript-eslint/no-unsafe-assignment
+		ElSubmenu,
+		ElMenuItem,
 		N8nIcon,
 		N8nTooltip,
 	},