fix(engine) Workaround for deck.gl attribute access

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[Pessimistress]

Should we just update how deck passes attributes to luma?

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Should we just update how deck passes attributes to luma?

Yes.

We should also decide how to handle constant attributes. The new Model class doesn't yet expose that API since WebGPU doesn't. I prefer the simplest possible API, meaning each attribute is either a Buffer or a typed array constant.

For WebGPU I see two choices, either we have to allocate and fill big buffers under the hood, or we could dynamically rewrite the shaders to use a uniform in those cases.

Replacing attributes with uniforms is a bit of a feature, and also complicated by the fact that uniforms need be provided through uniform buffers, so I suppose that could come later and we start with under the hood buffer generation...

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