When looking into wgpu-rs as a replacement for WebGL I went to the
examples directory on GitHub to browse for a bit.
I wanted to see some of the examples at a glance without needing to
clone the repository.
This commit enables that by adding a README to each example with a
description of the example and screenshots / example output.
In a few cases the description is a bit redundant - but my hope is that
in the future we can improve all the READMEs.
Being a web API and thus very accessible, WebGPU could end up being many
people's first introduction to graphics programming so the lower we make
the barrier the better.
The matrices in the examples are given in an OpenGL-like coordinate system,
while a Vulkan-like coordinate system is used by wgpu. This was previously
partially corrected in the shader and by flipping the up axis of the camera,
but left the x-axis mirrored in the final result.
This change adds a conversion matrix to framework.rs that can be used
to convert from OpenGL to wgpu. This also allows us to set the
winding-order to counter-clockwise, which matches the ordering in the data.
