feat: support the rich editor loader in media manager config file

Author: Maxime Leclercq

monsieurbiz/sylius-media-manager-plugin/2.0/config/packages/monsieurbiz_media_manager_plugin.yaml

@@ -7,6 +7,10 @@ liip_imagine:
             filesystem:
                 data_root:
                     - "%sylius_core.public_dir%/media" # Add media folder
+        monsieurbiz_sylius_rich_editor:
+            filesystem:
+                data_root:
+                    - "%sylius_core.public_dir%/media" # Add media folder
 
 twig:
     form_themes: ['@MonsieurBizSyliusMediaManagerPlugin/form/_theme.html.twig']