Wren 0.6.24

Wren 0.6.24 draws WebGL and positions with CSS anchors: Three.js and MapLibre run.

This is still a beta, under development.

WebGL and WebGL 2, through wgpu and naga, with a device and a thread for each context. Three.js examples and MapLibre maps run: a simple scene at 60 frames a second, a heavy one at 20 to 30, on a good GPU. A machine with no adapter gets null, as a page expects. Transform feedback and real queries are not there yet, nor WebGL in workers. There is no separate GPU process: a crash inside a driver takes the browser down.
CSS anchor positioning: anchor(), anchor-size(), position-area, position-try-fallbacks, @position-try, position-visibility, implicit anchors of popovers. The web-platform-tests of the folder go from 13.7 % to 85 %. No writing modes or anchor names across shadow trees.
A compiled loop's return no longer leaks stack depth: pages could end in a false "Maximum call stack".
TypedArray.prototype.set no longer traps on large arrays.
Scroll containers count the end margins of their children as scrollable overflow, as other browsers do: scrollHeight may grow.

#Wren 0.6.24