TextureNode: Introduce referenceNode

[sunag]

Description

It's allow that texture() sampler can be modified inside a function as parameter and preserve the root uniform as dynamic value. e.g:

const samplerNode = texture( map, uv() );

const otherUV = tslFn( ( [ tex ] ) => {

	const newSampler = tex.uv( viewportTopLeft ); // new sampler from TextureNode using as reference

	return newSampler;

} );

material.colorNode = otherUV( samplerNode );

// in loop

// this will update all instances (newSampler) created from samplerNode
samplerNode.value = otherMap;