Added french translation files for backend and frontend.

backend/fr/works.json

@@ -0,0 +1,19 @@
+{
+    "tlWorks": {
+        "record_edited": "The work entry has been updated",
+        "upload_image": "Uploaded image.",
+        "deleted_image": "The image has been deleted",
+        "work_deleted": "The work entry has been deleted",
+        "works_edit": "Edit a work",
+        "language": "Record language",
+        "language_explica": "Language of the record. Required.",
+        "title": "Title",
+        "title_explica": "The title of the work.",
+        "description": "Description",
+        "description_explica": "Description of the work.",
+        "recordKind": "Kind of work",
+        "kind_explica": "Type of the work.",
+        "material": "Material",
+        "material_explica": "The material, with which the work was created."
+    }
+}