Feat: add buttons to storybook

[anapaulalemos]

Added the button component and its variations to the storybook.

In order to use the styles, we have to generate the pre-compiled styles and js files running the build script: npm run build:dist.

I updated the package.json storybook scripts so:

• If we don't have the pre-compiled files we can run npm run storybook, that will run the build script and after that will start the storybook server;
• If we already have the pre-compiled files we can run npm run storybook:ci that only starts the storybook server

I also updated the Github action to run the build before deploy the storybook 😀

To test:

cd govie-frontend
npm i
npm run storybook

The storybook server should open on the port 3000