Improve import/export for colors

Currently colors can be imported as:
```
import { red } from '@actyx/industrial-ui/lib/colors
```

Instead should be imported as:

```
import { red } from '@actyx/industrial-ui/colors
```

Start by tracing the package entry points behind the current `@actyx/industrial-ui/lib/colors` import and the desired `@actyx/industrial-ui/colors` import. Verify that the shorter path resolves to the same color exports and add or update the relevant import/export test if one exists; done means the documented import works without `/lib`.

Rédigé par le modèle d'indexation à partir du texte de l'issue.