refactor(build): update rollup shaderChunks

[epreston]

improve glsl processing to compress build sizes by a modest amount.

Described in #5601

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[willeastcott]

Looks great - thanks for this @epreston! 🚀

[epreston]

Karma is a fitting name. I'll look into that. I haven't been running the karma tests so this is fair.

[willeastcott]

Yeah, you have to be careful about being overzealous with trimming whitespace in shader chunks. 😄 I believe the old code prevented this.

[epreston]

Running through it now. I'll update and document.

[epreston]

shaders processing code requires a final new line for each chunk. doesn't affect the operation of the engine or examples but causes type warnings. Added final new line.

[kungfooman]

To quote @willeastcott from another PR:

I have a goal to eliminate as many files and configuration from the root of the repo as possible - this keeps it simple and accessible to contributors

I'm not sure why we're suddenly excited about watering down that position now?

[epreston]

This file is not in the root of the repo.

It is removing a chunk of code from root and moving it to utils. I feel this follows the spirit of that idea. Actually, I want to move all of rollup into utils. Good reminder. Don't want to get off topic.