Global Digital Newspaper & Magazines Market Size, Share & Demand Report By Content Type (Digital Newspapers, Digital Magazines, Professional & Niche Publications), By Revenue Model (Paid Subscriptions, Advertising-Based, Freemium & Licensing), By Platform (Web, Mobile Apps, Tablets, E-Readers), By End User (Individual, Institutional, Corporate, Government), By Region & Segment Forecasts, 2025–2030