TSL: Introduce time

[sunag]

Description

timerLocal(), timerGlobal() and timerDelta() the differences are often confusing to the user and not everyone ends up using the scale argument present in the function. This was replaced by time and deltaTime, which are the most common variable present in various projects. The class name was changed to Timer. In addition to the better design, the uniform is updated once per frame, which should result in better performance.

The oscillators were also simplified.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	688.13 170.5	688.13 170.5	+0 B +0 B
WebGPU	808.38 217.75	807.6 217.49	-786 B -263 B
WebGPU Nodes	807.89 217.62	807.11 217.36	-786 B -262 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	462.85 111.78	462.85 111.78	+0 B +0 B
WebGPU	536.6 144.85	535.38 144.47	-1.22 kB -371 B
WebGPU Nodes	492.71 134.59	491.49 134.28	-1.22 kB -300 B