Added early basic media viewing in Talk

pubspec.yaml

@@ -47,16 +47,13 @@ dependencies:
   json_annotation: ^4.8.0
   localstore: ^1.2.3
   intl: ^0.17.0
-  webdav: #^1.0.9
-    git:
-      url: https://github.com/timestee/dart-webdav.git
-      ref: 1a70d3f7236484ed170f688980020b344d729d39
   nextcloud:
     git:
       url: https://github.com/provokateurin/nextcloud-neon
       path: packages/nextcloud
   flutter_launcher_icons: ^0.11.0
   pretty_json: ^2.0.0
+  cached_network_image: ^3.2.3
 
 dependency_overrides:
   xml: ^6.2.2