fix(types): remove references to Shader type

[Methuselah96]

Why

The types have errors when used with @types/three@0.160.0, because the Shader type was removed in @types/three@0.160.0 due it it being used in ways it wasn't intended to be used. The type errors are:

Error: ./node_modules/three-stdlib/postprocessing/ShaderPass.d.ts(1,10): error TS2305: Module '"three"' has no exported member 'Shader'.
Error: ./node_modules/three-stdlib/shaders/types.d.ts(1,25): error TS2305: Module '"three"' has no exported member 'Shader'.

What

Remove use of the Shader type with more suitable types.

Checklist

• Ready to be merged

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[CodyJasonBennett]

Thanks.

[github-actions]

🎉 This PR is included in version 2.28.8 🎉

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