Add generic typeless InputField component

[gfpacheco]

Adds a new generic typeless InputField component as per discussed here: #578

Not sure that's something you still want, and since English is not my native language I didn't even try to write any docs for it, sorry.

[cannikin]

This is great, thanks! I can add the docs for it.

What do you think about the loop that generates each of the other types now returning this instead of a raw HTML <input> the way it does now? Then there's only one instance of <input> anywhere and it's inside this component.

[gfpacheco]

That makes total sense! I don't know how I didn't see that earlier. I guess I still need to be more comfortable with the code, look around more and not be so scared of breaking things 😂

[cannikin]

haha We break things all the time, you get used to it! 😅

[cannikin]

I'll test this next week and merge, then add some docs!

[cannikin]

Took a while but it's done, thanks again!