* Docs: Fixed README.md

* Docs: fixed README.md

fix docs site import components from package's /lib on dev mode bug

Initially it was `en-us`, but the folder is `en-US` .

When creating a new component, the build doesn't work because it hopes a file in the `en-US` folder.

use `text-align: left` to display line-wrapped labels properly

```css
   --button-paddding: 5px 20px; /* useless */
```

Fix typo.