WebGPURenderer: Fix Material Arrays and Geometry Groups

[RenaudRohlinger]

Fixed #29268

Description

• Draw Range on Wireframe Materials: Corrected the drawRange handling for meshes with material.wireframe enabled, ensuring proper rendering.
• Material Arrays and Geometry Groups: Fixed inconsistencies with material arrays and geometry groups in both WebGPU and WebGL backends. Now, both backends correctly align with expected WebGLRenderer behaviors.
• New Example added to showcases material arrays, geometry groups, and wireframe rendering for both WebGL and WebGPU backends. The behavior has been validated against WebGLRenderer, ensuring consistency across renderers.

This contribution is funded by Segments.AI & Utsubo

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	685.4 kB 169.7 kB	685.4 kB 169.7 kB	+0 B +0 B
WebGPU	818.7 kB 221.3 kB	819.2 kB 221.5 kB	+520 B +168 B
WebGPU Nodes	818.3 kB 221.2 kB	818.8 kB 221.4 kB	+939 B +273 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	462 kB 111.4 kB	462 kB 111.4 kB	+0 B +0 B
WebGPU	564.8 kB 153.4 kB	565.4 kB 153.5 kB	+520 B +183 B
WebGPU Nodes	524.2 kB 143.8 kB	524.7 kB 143.9 kB	-40.14 kB +128 B

[Methuselah96]

Should this be using WebGPURenderer?