IO module design using oriented object programming

Hello it seems the io module could be reimplemented using object oriented programming either deriving a new class from the Trimesh.trimesh or overloading the load_mesh and export methods. It could be cleaner and easier to use. What do you think ?
Alex

Start by examining the IO module and the existing Trimesh.trimesh class, including the load_mesh and export methods mentioned in the issue. Clarify whether the goal is inheritance or method overloading, then define the intended public API and compatibility expectations before implementation.

Written by the indexing model from the issue text.