build: add LandingPage Storybook stories

src/pages/LandingPage/LandingPage.stories.tsx

@@ -0,0 +1,21 @@
+import { withRootAppLayoutDecorator } from "@/../.storybook/decorators";
+import { LandingPage } from "./LandingPage";
+import type { Meta, StoryObj } from "@storybook/react";
+
+const meta = {
+  title: "Pages/LandingPage",
+  component: LandingPage,
+  decorators: [withRootAppLayoutDecorator],
+  parameters: {
+    layout: "fullscreen",
+  },
+} satisfies Meta<typeof LandingPage>;
+
+export default meta;
+
+///////////////////////////////////////////////////////////
+// STORIES
+
+type Story = StoryObj<typeof meta>;
+
+export const BasicDemo = {} satisfies Story;