chore(sb): remove storybook examples

src/stories/Button.stories.ts

src/stories/Header.stories.ts

src/stories/Page.stories.ts

src/stories/User.ts

src/stories/button.component.ts

src/stories/button.css

src/stories/header.component.ts

src/stories/header.css

src/stories/page.component.ts

src/stories/page.css