Global Pen Holder Stand Market Size, Share & Demand Report By Product Type (Single-Compartment Pen Holders, Multi-Compartment Desk Organizers, Rotating Pen Holders, Modular & Expandable Organizers, Decorative & Designer Holders, Smart Pen Holders), By Material Type (Plastic, Metal, Wood, Leather & Faux Leather, Ceramic & Glass, Eco-Friendly Materials), By Distribution Channel (Online Retail, Offline Retail), By End User (Corporate Offices, Educational Institutions, Household & Home Offices, Government Institutions, Hospitality & Commercial Spaces), By Region & Segment Forecasts, 2026–2031