Feature: Add online status to each user (#452)

* Feature: Add online status to each user
* Add OnlineStatusable, add availability status to thumbnail

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

@@ -0,0 +1,10 @@
+json.array! @agents do |agent|
+  json.account_id agent.account_id
+  json.availability_status agent.availability_status
+  json.confirmed agent.confirmed?
+  json.email agent.email
+  json.id agent.id
+  json.name agent.name
+  json.role agent.role
+  json.thumbnail agent.avatar_url
+end

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

@@ -1,7 +1,8 @@
 json.payload do
+  json.availability_status @contact.availability_status
+  json.email @contact.email
   json.id @contact.id
   json.name @contact.name
-  json.email @contact.email
   json.phone_number @contact.phone_number
   json.thumbnail @contact.avatar_url
 end

app/views/api/v1/widget/inbox_members/index.json.jbuilder

@@ -2,5 +2,6 @@ json.payload do
   json.array! @inbox_members do |inbox_member|
     json.name inbox_member.user.name
     json.avatar_url inbox_member.user.avatar_url
+    json.availability_status inbox_member.user.availability_status
   end
 end