Changed branding across the application:
- email_service.py: Updated footers in password reset and welcome emails
- base.html: Updated meta description and footer text
- landing.html: Updated page title
New tagline: "Platforma Networkingu Regionalnej Izby Przedsiębiorców Norda Biznes"
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
