feat: add reauth flow for wa embedded signup (#11940)

# Pull Request Template

## Description

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relevant motivation, context, and any dependencies that this change
requires.
Fixes # (issue)

## Type of change

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- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
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## How Has This Been Tested?

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instructions so we can reproduce. Please also list any relevant details
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## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
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---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

config/locales/en.yml

@@ -31,6 +31,11 @@
 
 en:
   hello: 'Hello world'
+  inbox:
+    reauthorization:
+      success: 'Channel reauthorized successfully'
+      not_required: 'Reauthorization is not required for this inbox'
+      invalid_channel: 'Invalid channel type for reauthorization'
   messages:
     reset_password_success: Woot! Request for password reset is successful. Check your mail for instructions.
     reset_password_failure: Uh ho! We could not find any user with the specified email.
@@ -67,6 +72,13 @@ en:
       invalid_message_type: 'Invalid message type. Action not permitted'
     slack:
       invalid_channel_id: 'Invalid slack channel. Please try again'
+    whatsapp:
+      token_exchange_failed: 'Failed to exchange code for access token. Please try again.'
+      invalid_token_permissions: 'The access token does not have the required permissions for WhatsApp.'
+      phone_info_fetch_failed: 'Failed to fetch phone number information. Please try again.'
+      reauthorization:
+        generic: 'Failed to reauthorize WhatsApp. Please try again.'
+        not_supported: 'Reauthorization is not supported for this type of WhatsApp channel.'
     inboxes:
       imap:
         socket_error: Please check the network connection, IMAP address and try again.