A langcode variable was added to the theme array and is available in the twig file.

Now there exists a configuration page to exclude errors that are needed to ignore (s.e.: not reproducible on live environments).

Add colors validation:
Issue #3341467: Use the ebt core method to validate the HEX color element

Development branch containing D10 compatibility.

Add validation method for colors:
Issue #3341467: Use the ebt core method to validate the HEX color element