[Feature request] It would be nice to have an example of creating an arbitrary mesh

[cx20]

I would like to add RedCube.js to webgl-test and webgpu-test. webgl-test is a repository for testing the basic usage of the WebGL/WebGL2 library, and webgpu-test is a repository for testing the WebGPU library.

However, I have not been able to find a way to create a mesh from code using RedCube.js. It would be great if you could provide some sample code if you can.