Creation and update dates visible for images and scenes (#2145)

* Exposed created_at and updated_at dates on the detail panels for images and scenes
* Add fields to gallery page
* Internationalisation

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

graphql/documents/data/gallery.graphql

@@ -2,6 +2,8 @@ fragment GalleryData on Gallery {
   id
   checksum
   path
+  created_at
+  updated_at
   title
   date
   url

graphql/documents/data/image.graphql

@@ -6,6 +6,8 @@ fragment ImageData on Image {
   organized
   o_counter
   path
+  created_at
+  updated_at
 
   file {
     size

graphql/documents/data/scene.graphql

@@ -13,6 +13,8 @@ fragment SceneData on Scene {
   phash
   interactive
   interactive_speed
+  created_at
+  updated_at
 
   file {
     size