Input adjustements

[enguerranws]

Using this component, I thought some <label> related improvments could be useful:

• a hideLabel prop: not documented on DSFR docs, but we could allow users to provide a valid label but hide it (using sr-only to make it still readable by screen readers).
• removed aria-labelled attribute: as long as the label prop is mandatory and linked to the related input with htmlFor, I don't see why we should keep it.
• I added the support of the type file input (https://www.systeme-de-design.gouv.fr/elements-d-interface/composants/ajout-de-fichier), wrapping it with a fr-upload-group : I was about creating a new component (to follow DSFR naming and docs), but it appears that Input and File are just the same, only the wrapper class is changing. Maybe we should create a File component that just wraps Input component?

[enguerranws]

Well, I think we should have a separate File component that wraps the Input component: at least, it could handle a max file size property, which makes a validation on the uploaded file (on onChange event).

[garronej]

Sorry it took me a week to review this.
I'm doing it now

[garronej]

Ok thank you for your contribution.
I'll merge this :)