chore(storybook): Move Storybook in it's own dir && Remove engines field from package.json (#34)

* Move Storybook dir
* Remove engines field from package.json

Author: frederikhors

.storybook/main.js

@@ -22,8 +22,7 @@ Hooks for managing, caching and syncing asynchronous and remote data in Svelte
 You noticed a bug, a possible improvement or whatever?
 Any help is always appreciated, so don't hesitate opening one!
 
-Be sure to check out the [contributing guidelines](CONTRIBUTING.md) to fasten
-up the merging process.
+Be sure to check out the [contributing guidelines](CONTRIBUTING.md) to fasten up the merging process.
 
 **Get started (Devs)**
 
@@ -34,6 +33,14 @@ yarn
 yarn storybook
 ```
 
+**Running Storybook**
+
+```bash
+cd storybook
+yarn
+yarn start
+```
+
 **Running the tests**
 
 ```bash