Adopt vincentlanglet/twig-cs-fixer for Twig coding standards

Hi Silvi,

Welcome to the UI Suite Bootstrap project

Don't take the issue only to run the command. This is something anybody can do and your MR will not be accepted.

Hi,

Postponing until core issue is resolved and the tool is integrated into Drupal Gitlab CI template (we can do an issue to push it forward once core will adopt it)