Cabin Retrofit and Reconfiguration Market Size, Share & Industry Analysis, By Aircraft Platform (Narrowbody, Widebody, Regional, Business Aviation, and Military), By Retrofit Workscope (Layout & Capacity Changes, Class-Mix Reconfiguration, Cabin Product Refresh, & Others), By Cabin Workscope (Seats & Restraints, Monuments, Bins & Stowage, Lining & Interiors, and Others), By Offering (Cabin Design & Engineering, Certification & Approvals, Kits Supply, & Others), By End User (Airlines, Aircraft Lessors, Leisure Operators, Government / VIP Operators, and MROs), and Regional Forecast, 2026-2034