Vector: Use MathUtils.clamp() internally

[satelllte]

Description

Consume MathUtils.clamp everywhere inside VectorN implementations for better readability

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	692.55 171.49	692.21 171.45	-336 B -38 B
WebGPU	822.23 221.94	821.89 221.91	-336 B -35 B
WebGPU Nodes	821.34 221.74	821 221.7	-336 B -37 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	464.89 112.3	464.56 112.27	-336 B -33 B
WebGPU	542.43 146.79	542.09 146.75	-336 B -33 B
WebGPU Nodes	498.37 136.53	498.03 136.5	-336 B -36 B