[Feature] Website live chat (#187)

Co-authored-by: Nithin David Thomas <webofnithin@gmail.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

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

@@ -10,6 +10,7 @@ json.data do
       json.channel_type inbox.channel_type
       json.avatar_url inbox.channel.try(:avatar).try(:url)
       json.page_id inbox.channel.try(:page_id)
+      json.website_token inbox.channel.try(:website_token)
     end
   end
 end