Add single page viewer

pubspec.yaml

@@ -12,6 +12,7 @@ dependencies:
   cryptography_flutter: ^2.3.0
   dio: ^5.3.2
   dio_cookie_manager: ^3.1.0+1
+  dio_image_provider: any
   enum_flag: ^1.0.2
   event_listener: ^0.2.0
   file: ^6.1.4
@@ -27,10 +28,12 @@ dependencies:
   infinite_scroll_pagination: ^4.0.0
   intl: any
   json_annotation: ^4.8.1
+  keymap: ^0.0.92
   logging: ^1.2.0
   palette_generator: ^0.3.3+3
   path: ^1.8.3
   path_provider: ^2.1.0
+  photo_view: ^0.14.0
   retrofit: ^4.0.1
   shared_preferences: ^2.2.0
   super_clipboard: ^0.6.4