feat: Telegram Channel (#2901)

- Ability to configure telegram bots as a channel in chatwoot
- Receive a message sent to the telegram bot in chatwoot
- Ability to reply to telegram users from chatwoot
- Receive attachment messages in chatwoot

fixes: #1843

app/jobs/send_reply_job.rb

@@ -11,6 +11,8 @@ class SendReplyJob < ApplicationJob
       ::Twitter::SendOnTwitterService.new(message: message).perform
     when 'Channel::TwilioSms'
       ::Twilio::SendOnTwilioService.new(message: message).perform
+    when 'Channel::Telegram'
+      ::Telegram::SendOnTelegramService.new(message: message).perform
     end
   end
 end

app/jobs/webhooks/telegram_events_job.rb

@@ -0,0 +1,12 @@
+class Webhooks::TelegramEventsJob < ApplicationJob
+  queue_as :default
+
+  def perform(params = {})
+    return unless params[:bot_token]
+
+    channel = Channel::Telegram.find_by(bot_token: params[:bot_token])
+    return unless channel
+
+    Telegram::IncomingMessageService.new(inbox: channel.inbox, params: params['telegram'].with_indifferent_access).perform
+  end
+end