Nodes: Add AtomicFunctionNode

[cmhhelgeson]

Description

Adds the ability to execute atomic functions from within compute shaders. A total swaps indicator has been added to the UI of Compute Bitonic Sort.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	685.94 169.78	685.94 169.78	+0 B +0 B
WebGPU	833.38 223.44	834.9 223.91	+1.52 kB +464 B
WebGPU Nodes	832.89 223.32	834.41 223.78	+1.52 kB +463 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	462.29 111.52	462.29 111.52	+0 B +0 B
WebGPU	530.84 143.04	531.72 143.33	+885 B +290 B
WebGPU Nodes	487.5 132.9	488.38 133.2	+885 B +298 B

[cmhhelgeson]

Converting to draft since atomic operations actually need to be able to be assigned to variables.

[cmhhelgeson]

The solution I arrived at was just adding a storeNode to each of the atomic functions similar to how storageTexture works, which isn't ideal but at least seems cleaner to me.