Function capitalize

packages/cli/src/ui/components/ThemeDialog.tsx:59–59

(s: string)

    .filter((theme) => theme.type !== 'custom');
  const customThemeNames = Object.keys(customThemes);
  const capitalize = (s: string) => s.charAt(0).toUpperCase() + s.slice(1);
  // Generate theme items
  const themeItems = [
    ...builtInThemes.map((theme) => ({