Add a guide on how to setup Semantic-UI-React for use in Next.js Application

Problem description

While there is a guide on how to set it up in your react application, the guide isn't working on a Next.js Application, due to the different project-structure.

Proposed solution

Please add a new guide on how to set Semantic-UI-react up for a Next.js application (custom themeing would

Now that we are using storybook enviroment to help us develop our components. We must create stories to document all components. Follow the guide in the CONTRIBUTING.md to write the stories.

Components

• ActionMenu
• Alert
• AutocompleteInput
• Box
• Button
• ButtonGroup
• ButtonPlain
• ButtonWithIcon
• Card
• Checkbox
• CheckboxGroup

There's missing documentation on how biotope behaves regarding copying assets in the component folder.

The behaviour is as followed:
All folders and files with and _ are ignored, as well as scss and ts files. They'll get transpiled and put back in the folder 👍
Everything else is copied over, the folder structure stays the same.

The notification message component applies it's status property to the variation prop of two oc-icons here https://github.com/owncloud/owncloud-design-system/blob/703f71c999607f951ab463ee50a39d814c828ec9/src/elements/OCNotificationMessage.vue#L3 and https://github.com/owncloud/owncloud-design-system/blob/703f71c999607f951ab463ee50a39d814c828ec9/src/elements/OCNotificationMessage.vue#L18

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