feat: implement light and dark theme (#30)

packages/bolt/app/components/ui/ThemeSwitch.tsx

@@ -0,0 +1,29 @@
+import { useStore } from '@nanostores/react';
+import { memo, useEffect, useState } from 'react';
+import { themeStore, toggleTheme } from '~/lib/stores/theme';
+import { IconButton } from './IconButton';
+
+interface ThemeSwitchProps {
+  className?: string;
+}
+
+export const ThemeSwitch = memo(({ className }: ThemeSwitchProps) => {
+  const theme = useStore(themeStore);
+  const [domLoaded, setDomLoaded] = useState(false);
+
+  useEffect(() => {
+    setDomLoaded(true);
+  }, []);
+
+  return (
+    domLoaded && (
+      <IconButton
+        className={className}
+        icon={theme === 'dark' ? 'i-ph-sun-dim-duotone' : 'i-ph-moon-stars-duotone'}
+        size="xl"
+        title="Toggle Theme"
+        onClick={toggleTheme}
+      />
+    )
+  );
+});