Restructure omni services and add Chatwoot research snapshot

research/chatwoot/enterprise/app/services/voice/provider/twilio/adapter.rb

@@ -0,0 +1,52 @@
+class Voice::Provider::Twilio::Adapter
+  def initialize(channel)
+    @channel = channel
+  end
+
+  def initiate_call(to:, conference_sid: nil, agent_id: nil)
+    call = twilio_client.calls.create(**call_params(to))
+
+    {
+      provider: 'twilio',
+      call_sid: call.sid,
+      status: call.status,
+      call_direction: 'outbound',
+      requires_agent_join: true,
+      agent_id: agent_id,
+      conference_sid: conference_sid
+    }
+  end
+
+  private
+
+  def call_params(to)
+    phone_digits = @channel.phone_number.delete_prefix('+')
+
+    {
+      from: @channel.phone_number,
+      to: to,
+      url: twilio_call_twiml_url(phone_digits),
+      status_callback: twilio_call_status_url(phone_digits),
+      status_callback_event: %w[
+        initiated ringing answered completed failed busy no-answer canceled
+      ],
+      status_callback_method: 'POST'
+    }
+  end
+
+  def twilio_call_twiml_url(phone_digits)
+    Rails.application.routes.url_helpers.twilio_voice_call_url(phone: phone_digits)
+  end
+
+  def twilio_call_status_url(phone_digits)
+    Rails.application.routes.url_helpers.twilio_voice_status_url(phone: phone_digits)
+  end
+
+  def twilio_client
+    Twilio::REST::Client.new(config['account_sid'], config['auth_token'])
+  end
+
+  def config
+    @config ||= @channel.provider_config_hash
+  end
+end