feat: Ability to update avatars from super admin (#7264)

- Ability to update user avatars from super admin
- Ability to update bot avatars from super admin

fixes: #7060

app/dashboards/user_dashboard.rb

@@ -11,6 +11,11 @@ class UserDashboard < Administrate::BaseDashboard
     account_users: Field::HasMany,
     id: Field::Number,
     avatar_url: AvatarField,
+    avatar: Field::ActiveStorage.with_options(
+      destroy_url: proc do |_namespace, _resource, attachment|
+        [:avatar_super_admin_user, { attachment_id: attachment.id }]
+      end
+    ),
     provider: Field::String,
     uid: Field::String,
     password: Field::Password,
@@ -69,6 +74,7 @@ class UserDashboard < Administrate::BaseDashboard
   # on the model's form (`new` and `edit`) pages.
   FORM_ATTRIBUTES = %i[
     name
+    avatar
     display_name
     email
     password