TSL: Use multi argument versions of min and max

[kristiker]

min and max support multiple arguments, so we can do this

- max( max( currentColor.r, currentColor.g ), currentColor.b )
+ max( currentColor.r, currentColor.g, currentColor.b )

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	337.26 78.64	337.26 78.64	+0 B +0 B
WebGPU	553.48 153.41	553.47 153.41	-8 B -2 B
WebGPU Nodes	552.83 153.26	552.82 153.26	-8 B -2 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	468.44 113.28	468.44 113.28	+0 B +0 B
WebGPU	628.43 170.1	628.43 170.1	+0 B +0 B
WebGPU Nodes	583.28 159.44	583.28 159.44	+0 B +0 B