feat: Add pending message on dashboard (#1547)

app/javascript/shared/constants/messages.js

@@ -0,0 +1,12 @@
+export const MESSAGE_STATUS = {
+  FAILED: 'failed',
+  SENT: 'sent',
+  PROGRESS: 'progress',
+};
+
+export const MESSAGE_TYPE = {
+  INCOMING: 0,
+  OUTGOING: 1,
+  ACTIVITY: 2,
+  TEMPLATE: 3,
+};