[Feature] Add a universal model API #155
Description
As for now UMC only provides obj model loader and almost every related classes are under package model.obj, including many reusable classes like VertexBuffer.
Besides it lacks a general API to access model data which mean modders must directly get the data from VBO themselves, making it quite difficult to migrate to glDrawElements which is recommended in 1.17+ and have a better performance than glDrawArray..