feat: Line Channel (#2904)

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

fixes: #2738

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::Line'
+      ::Line::SendOnLineService.new(message: message).perform
     when 'Channel::Telegram'
       ::Telegram::SendOnTelegramService.new(message: message).perform
     end