[WIP][beta] Novair Tristar

This add-on features a beta version of the Novair livery for the Tristar aircraft, created for the Novair Virtual airline in Microsoft Flight Simulator. The livery currently uses a combination of 2K and 4K textures, with plans to transition fully to 4K. Known issues include missing registration, minor color mismatches, and a non-custom cabin, all slated for future updates. Feedback on bugs is encouraged to help improve the livery in subsequent versions.