NexoPOS 4.2.3

this update comes with some slight improvements.

Changelog :

• Added : return exact string for unmatched translation
• Fixed : create symbolic link on windows for language
• Fixed : flat array with keys
• Added : new hook when crud form is loaded
• Added : new filter when crud footer form is rendered
• Added : new filter when settings footer is rendered
• Fixed : missing translation file on vue component
• Update : ckeditor.
• Added : 2 languages (French & Spanish)
• Fixed : ensure localization is correctly loaded
• Added : new path to extract classes.