feat(input): add input component

[tleperou]

What is it?

• Feature / enhancement
• Bug
• Docs / tests

Description

Add a wrapper to handle user inputs – aria-compliant:

• wrap in a representational div
• add label with for
• add input with labeledby
• support hint (cf. instructions) and message (cf. errors)

Use cases and why

Anywhere user inputs are needed.

Screenshots/Demo

n/a

Checklist:

• My code follows the developer guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• Added new tests to cover the fix / functionality

[tleperou]

I used the input-phone to integrate the doc – hence the merges.

Question: shall it be a Primitive?

[gioboa]

Looks good to me

[gioboa]

I used the input-phone to integrate the doc – hence the merges.

Question: shall it be a Primitive?

I think the input implementation here is an headless one because it's more than just an input wrapper.

[gioboa]

Closed #257