&scriblz Update: Scriblz x Clay UI Demo

I've been adding in a bunch of examples to showcase Scriblz (https://codeberg.org/scriblz/scriblz) capabilities.
Here is an example that uses Clay (https://github.com/nicbarker/clay) as the UI layout library and Scriblz
as the rendering backend.

See an interactive browser demo here: https://hollinwilkins.com/scriblz/example.html?example=clay

It showcases some more interesting features like text layout, layer blending, gradients, and images.
Every pixel is rendered with Scriblz and its WebGPU backend.

For full disclosure: AI was used for CMake builds and the examples code. All code in scriblz.h and hw/ folder is my own handwritten