Allow access enabled toggles in twig templates

The last submitted patch, 2: feature-toggle_add_twig_compability-3365885-2.patch, failed testing. View results →
- codesniffer_fixes.patch Interdiff of automated coding standards fixes only.

Replace trait to abstract service base to allow override constructor.

This looks like a nice feature and I would be probably interested in having it.
However, I think would be better to implement it as a twig function to avoid using hook_preprocess(), which could be overkill.

Created MR adding a new Twig function feature_toggle_status that gets a feature name as parameter. It would return TRUE if the feature exists and is enabled. FALSE otherwise.

{%- if feature_toggle_status('my_feature') -%}passed{%- else -%}rejected{%- endif -%}

I really like this approach, thank you @plopesc!

Automatically closed - issue fixed for 2 weeks with no activity.