Switch from push constants to storage buffers #56

Job	Run time
lint (cargo-gpu)	1m 47s
xtask test & lint	1m 43s
lint (spirv-builder)	1m 44s
test (macOS-latest, spirv-builder)	6m 12s
test (ubuntu-24.04, spirv-builder)	6m 12s
test (windows-2022, cargo-gpu)	6m 9s
test (windows-2022, spirv-builder)	6m 6s
test (ubuntu-24.04, cargo-gpu)	6m 11s
test (macOS-latest, cargo-gpu)	6m 15s
test_success	4s
	42m 23s

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