Fix/fr localization assets (#3603)

* docs: fr: add missing pattern images and fix acyclic-visitor folder name

* docs: fr: rename localization folders to match upstream pattern directories

localization/fr/adapter/README.md

@@ -92,7 +92,7 @@ captain.row();
 ```
 
 ## Diagramme des classes
-![alt text](../../../adapter/etc/adapter.urm.png "Adapter class diagram")
+![alt text](./etc/adapter.urm.png "Adapter class diagram")
 
 ## Application
 Utiliser le pattron de conception adapter lorsque