Add English and Norwegian versions of the thank you page
with confirmation instructions and newsletter subscription
notification when applicable
Style the warning highlight with oklch color
Add Listmonk integration for newsletter subscriptions
Add newsletter checkbox to form
Handle newsletter subscription on form submission
Add session flag for thank you page
Remove duplicate sign-now ID from form section
Add cover image, introduction, call-to-action, and thank-you pages
Add petition form styling and functionality
Include bilingual support for English and Norwegian
Implement signature confirmation flow
Add metadata for campaign configuration
