Texture: Introduce width, height, depth

[sunag]

Related issue: #31022

Description

Introduce partial support for texture.width, texture.height and texture.depth.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	336.33 78.33	336.33 78.33	+0 B +0 B
WebGPU	547.81 151.89	547.81 151.89	+0 B +0 B
WebGPU Nodes	547.16 151.73	547.16 151.73	+0 B +0 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	465.78 112.28	466.09 112.57	+311 B +294 B
WebGPU	622.7 168.46	623.01 168.68	+311 B +229 B
WebGPU Nodes	577.57 157.72	577.88 157.99	+311 B +263 B