Added Priority for YAML configuration

Author: mnocon

code_samples/back_office/components/twig_components.yaml

@@ -2,10 +2,12 @@ ibexa_twig_components:
     admin-ui-user-menu:
         custom-html-component:
             type: html
+            priority: 0
             arguments:
                 content: '<b>Hello world!</b>'
         custom-template-component:
             type: template
+            priority: 50
             arguments:
                 template: '@ibexadesign/ui/component/user_thumbnail/user_thumbnail.html.twig'
                 parameters:

docs/templating/components.md

@@ -44,11 +44,12 @@ ibexa_twig_components:
         # Component name
         google_tag_manager:
             type: script
+            priority: 50
             arguments:
                 src: 'https://...'
 ```
 
-The Component priority cannot be specified when using the YAML configuration, but it allows you to use the built-in components to quickly achieve common goals.
+YAML configuration allows you to use the built-in components to quickly achieve common goals.
 
 You can use an unique group name when creating a Twig Component to create your own group.