!!! FEATURE: Refactor login form to Fusion

[Sebobo]

This replace the fluid part of the frontend login with Fusion Forms and AFX.

As this is a breaking change a new major release will be necessary.

[Sebobo]

@mficzel I have a problem with the field names here to make it work properly.

The necessary field name in the input has to be __authentication[Neos][Flow][Security][Authentication][Token][UsernamePassword][username]

But it's rendered as --flowpack_neos_frontendlogin-loginform[__authentication][Neos][Flow][Security][Authentication][Token][UsernamePassword][username]

Can you see what I do wrong?

[Sebobo]

Maybe we should make it possible to more easily replace the css classnames.
But would be great if someone else can look at that.
Also I made it possible to translate more parts of the login as some labels were static.

[mficzel]

@Sebobo i made a pr against this branch that goes a bit further and gets rid of this plugin mess since there is absolutely no need for that Sebobo#1

[mficzel]

I accidentally pushed my changes to your branch and had to force push the previous state. heere is the updated pr Sebobo#2

[Sebobo]

Replaced by #26