Hi everyone!

It would be nice to change the header of the Community page.
Currently, it only shows the username:

The idea would be to use instead the real name of the user (if available).
But first, the Dart package needs to be updated: openfoodfacts/openfoodfacts-dart#1184

Then, once a new version of the package is released, change the header to (depending of the time of the day):

• Welcome xx
• Good morning xx
• Good afternoon xx
• Good night xx