feat(storybook): enable dark mode toggle (#1016)

packages/component/.storybook/preview.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
-import { getLightTheme, ThemeProvider } from '../src';
-
+import { getDarkTheme, getLightTheme, ThemeProvider } from '../src';
+import { useDarkMode } from 'storybook-dark-mode-v7';
 export const parameters = {
   actions: { argTypesRegex: '^on[A-Z].*' },
   controls: {
@@ -12,11 +12,13 @@ export const parameters = {
 };
 
 const lightTheme = getLightTheme('page');
+const darkTheme = getDarkTheme('page');
 
 export const decorators = [
   (Story: React.ComponentType) => {
+    const isDark = useDarkMode();
     return (
-      <ThemeProvider theme={lightTheme}>
+      <ThemeProvider theme={isDark ? darkTheme : lightTheme}>
         <Story />
       </ThemeProvider>
     );