Refactor media upload

Use Upload Media logic from Pleroma

Backend changes for picture upload

Move AS <-> Model conversion to separate module

Front changes

Downgrade apollo-client: https://github.com/Akryum/vue-apollo/issues/577

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/graphql/search.ts

@@ -23,7 +23,9 @@ query SearchGroups($searchText: String!) {
   searchGroups(search: $searchText) {
     total,
     elements {
-      avatarUrl,
+      avatar {
+        url
+      },
       domain,
       preferredUsername,
       name,