chore: Provider API prototype (#3112)

Enabling Support for Whatsapp via 360Dialog as a prototype for the provider APIs. 

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/jobs/webhooks/whatsapp_events_job.rb

@@ -0,0 +1,13 @@
+class Webhooks::WhatsappEventsJob < ApplicationJob
+  queue_as :default
+
+  def perform(params = {})
+    return unless params[:phone_number]
+
+    channel = Channel::Whatsapp.find_by(phone_number: params[:phone_number])
+    return unless channel
+
+    # TODO: pass to appropriate provider service from here
+    Whatsapp::IncomingMessageService.new(inbox: channel.inbox, params: params['whatsapp'].with_indifferent_access).perform
+  end
+end