Some changes to make the storybook-emotion-example work

[dictyo]

• added React-import in GlobalStyles.tsx
• imported the created GlobalStyles.tsx instead of the twig-one
• changed main.js to use Webpack5 and added storybook-deps required for WebPack5
• changed main.js to enable use of Emotion>=11
• added/modified Babel-config for the example to work
• added some h1-Example to show baseCss-feature
• added lacking dep for @emotion/cache

[dictyo]

Tnx @ben-rogerson for giving me the urgently needed hints and features to make storybook work again with newest tailwind/emotion!