feat: Read/Delivery status for Whatsapp Cloud API (#5157)

Process field statuses received in webhook WhatsApp cloud API

ref: #1021

Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: Nithin David <1277421+nithindavid@users.noreply.github.com>

app/javascript/shared/constants/messages.js

@@ -1,6 +1,8 @@
 export const MESSAGE_STATUS = {
   FAILED: 'failed',
   SENT: 'sent',
+  DELIVERED: 'delivered',
+  READ: 'read',
   PROGRESS: 'progress',
 };