feat(email): implement email change request and verification process

- Added functionality for users to request an email change, including generating a verification code and setting an expiration time.
- Implemented methods in the User model to handle email change requests, code validation, and confirmation.
- Created a new job to update the user's email in Stripe after confirmation.
- Introduced rate limiting for email change requests and verification attempts to prevent abuse.
- Added a new notification for email change verification.
- Updated the profile component to manage email change requests and verification UI.

app/Notifications/Channels/TransactionalEmailChannel.php

@@ -16,7 +16,12 @@ class TransactionalEmailChannel
         if (! data_get($settings, 'smtp_enabled') && ! data_get($settings, 'resend_enabled')) {
             return;
         }
-        $email = $notifiable->email;
+
+        // Check if notification has a custom recipient (for email changes)
+        $email = property_exists($notification, 'newEmail') && $notification->newEmail
+            ? $notification->newEmail
+            : $notifiable->email;
+
         if (! $email) {
             return;
         }