Renderers: Initial support for Float16Array.

[Mugen87]

Related issue: #20587 (comment)

Description

The PR introduces initial support for Float16Array as an attribute data type in both renderers.

Since the support for Float16Array is still a bit of a problem, we need to guard every usage to avoid runtime errors.

https://caniuse.com/?search=Float16Array

I did not update Float16BufferAttribute yet which is still a safe pick for all platforms. Developers who want to use Float16Array now should create the array on app level and pass it to BufferAttribute ctor like shown in the updated example.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	337.57 78.74	337.65 78.76	+83 B +25 B
WebGPU	556.8 154.16	556.95 154.24	+156 B +86 B
WebGPU Nodes	556.15 154	556.3 154.01	+156 B +19 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	468.75 113.42	468.84 113.43	+83 B +13 B
WebGPU	632.54 171.18	632.69 171.2	+156 B +18 B
WebGPU Nodes	587.59 160.53	587.75 160.55	+156 B +19 B