💄 Add corporate event photo sharing and GuestCam alternative pages

- Implemented corporate event photo sharing page with sections for hero, social proof, features, how it works, use cases, testimonials, FAQs, and final call to action. - Created GuestCam alternative page highlighting the benefits of Knipsmig over GuestCam, including a comparison table, reasons to choose Knipsmig, features, migration information, FAQs, and a final call to action. :sparkles: Add wedding landing page, demo event setup, and SEO enhancements - Implement wedding landing page with sections for hero, social proof, features, testimonials, FAQs, and call-to-action. - Create demo event configuration and migration for public demo functionality. - Add comprehensive sitemap for improved SEO, including event type and feature pages. - Update public documentation to reflect Knipsmig's features and target audience.