rename storybook card dir to cards

frontend/packages/core/src/Cards/stories/card.stories.tsx

@@ -5,7 +5,7 @@ import type { CardProps } from "../card";
 import { Card, CardContent } from "../card";
 
 export default {
-  title: "Core/Card/Basic",
+  title: "Core/Cards/Basic",
   component: Card,
 } as Meta;
 

frontend/packages/core/src/Cards/stories/landing-card.stories.tsx

@@ -5,7 +5,7 @@ import type { LandingCardProps } from "../landing-card";
 import { LandingCard } from "../landing-card";
 
 export default {
-  title: "Core/Card/Landing Card",
+  title: "Core/Cards/Landing Card",
   component: LandingCard,
 } as Meta;