Add back missing Twig filters

As a start, I propose bringing the Twig IntlExtension → module back into this one.

Seems like that module has a conflict 🐛 Custom Core Twig Filter "format_date" conflicts with twig/intl-extra Active with Drupal core. Let's just copy-paste the original extension instead.

Backported ArrayExtension and IntlExtension.

The time_diff filter has a dependency on the symfony/translation package, so we can't use the original code. I'll add a custom one based on the suggestion in ✨ SyntaxError: Unknown "time_diff" filter Active .

dieterholvoet → credited maxilein → .