Chore: Switch from Carrierwave to ActiveStorage (#393)

app/views/api/v1/contacts/show.json.jbuilder

@@ -3,5 +3,5 @@ json.payload do
   json.name @contact.name
   json.email @contact.email
   json.phone_number @contact.phone_number
-  json.thumbnail @contact.avatar.thumb.url
+  json.thumbnail @contact.avatar_url
 end

app/views/api/v1/conversations/index.json.jbuilder

@@ -11,7 +11,7 @@ json.data do
         json.sender do
           json.id conversation.contact.id
           json.name conversation.contact.name
-          json.thumbnail conversation.contact.avatar.thumb.url
+          json.thumbnail conversation.contact.avatar_url
           json.channel conversation.inbox.try(:channel_type)
         end
         json.assignee conversation.assignee

app/views/api/v1/inboxes/index.json.jbuilder

@@ -4,7 +4,7 @@ json.payload do
     json.channel_id inbox.channel_id
     json.name inbox.name
     json.channel_type inbox.channel_type
-    json.avatar_url inbox.channel.try(:avatar).try(:url)
+    json.avatar_url inbox.channel.try(:avatar_url)
     json.page_id inbox.channel.try(:page_id)
     json.widget_color inbox.channel.try(:widget_color)
     json.website_token inbox.channel.try(:website_token)