Link translation case (upper/lower/camel)

[dragantl]

I find link translations a useful feature. However, it quickly became apparent that a bit of control over it would be great. For example:

{
   en: {
      home_address: 'Home address',
      missing_address: 'Please provide @:home_address'
   }
}

Using en.missing_address will result in Please provide Home address. It would be great to specify a case format for the link sting like so Please provide @.lower:home_address. Other modifiers can be used such as upper and camel. I think if more control is needed, formatting has to be used. Maybe this suggestion is also an overkill but seems like upper/lower/camel are most frequent modifiers.

[kissu]

Highly approved ! 🍡

[kazupon]

close due to implemented with #467