feat(specs): enrich response for list composition endpoint (#4819)

Author: ClaraMuller

specs/composition-full/common/schemas/listCompositionsResponse.yml

@@ -11,6 +11,18 @@ listCompositionsResponse:
       type: integer
       description: Number of pages.
       example: 100
+    page:
+      type: integer
+      description: Current page.
+      example: 0
+    hitsPerPage:
+      type: integer
+      description: Number of items per page.
+      example: 20
+    nbHits:
+      type: integer
+      description: Number of items.
+      example: 200
   required:
     - items
     - nbPages