feat(storybook): add shared SW notice and refine SW previews

- Add StoryNotice and a withSWNotice decorator so every visible SW Story
  shows the common notice above its title; non-SW Stories are unaffected.
- Align the SW Header overview with the common SW Story page layout, let the
  preview Stage fill the available width and keep inner scroll on narrow screens.
- Rename SW/Footer to SW/하단 명령어바 (sidebar title only, Story IDs fixed via
  id: "sw-footer"), drop the top SWHeader from its preview and lower the
  workspace height bounds by the removed 49px.

src/sw/sw-theme.stories.tsx

@@ -1,6 +1,7 @@
 import { useState, type CSSProperties, type ReactNode } from "react"
 import { createPortal } from "react-dom"
 import type { Meta, StoryObj } from "@storybook/react-vite"
+import { withSWNotice } from "./sw-story-notice"
 import {
   SWFooter, SWFooterCommandLine, SWHeader, SWTheme, SWViewerButton, SWViewerHeader, SWViewerHint, SWViewerSection,
 } from "@hm-design/sw"
@@ -23,6 +24,7 @@ const NESTED_THEME = { "--hm-sw-header-font-family": '"Malgun Gothic", sans-seri
 const meta = {
   title: "SW/Theme",
   parameters: { layout: "fullscreen", controls: { disable: true } },
+  decorators: [withSWNotice],
 } satisfies Meta
 export default meta
 type Story = StoryObj<typeof meta>