Rename template, crates and placeholders #23

Job	Run time
lint (spirv-builder)	5m 28s
xtask test & lint	1m 59s
lint (cargo-gpu)	7m 40s
test (ubuntu-24.04, spirv-builder)	6m 4s
test (windows-2022, spirv-builder)	9m 14s
test (macOS-latest, cargo-gpu)	9m 47s
test (macOS-latest, spirv-builder)	5m 24s
test (ubuntu-24.04, cargo-gpu)	7m 37s
test (windows-2022, cargo-gpu)	12m 10s
test_success	2s
	1h 5m 25s

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