The struct held provides access to the design metrics of the font scaled
to the font pixel size used by the element.
ChangeLog: Slint Language: Added font-metrics property to `Text` and `TextInput`.
Closes#6047
This adds a new wrapping mode called `char-wrap`, which allows for wrapping at any character.
Currently, it only supports the Qt backend, with the other backends falling back to `word-wrap` when this option is selected.