Add hints to input markdown fields

[annatraussnig]

Some input fields (e.g. biography on user profile) do support markdown:

However, this isn't written anywhere. So how do Republik members know about this feature? They don't. Let's change this and add hints to markdown fields.

I suggest creating a MdInput field in the Styleguide with relevant hints and links and use it instead of our standard input field whenever relevant. Replacing raw markdown with a wysiwyg editor later down the line also an option.

PS: we could also kill the feature and have only normal text.

[ovbm]

My 2 ct: Kill it. It's very very very unnecessary. :D

[annatraussnig]

Olivier, you are such a murderous soul. But, you have a point.

[ovbm]

I'm only going to be content when we eliminate user facing markdown from every form and input we have. :D