Rename template, crates and placeholders #26

Job	Run time
xtask test & lint	2m 7s
lint (spirv-builder)	5m 11s
test (macOS-latest, spirv-builder)	7m 58s
test (ubuntu-24.04, spirv-builder)	5m 48s
test (windows-2022, spirv-builder)	8m 38s
test (macOS-latest, cargo-gpu)	8m 59s
test (ubuntu-24.04, cargo-gpu)	7m 16s
test (windows-2022, cargo-gpu)	11m 54s
lint (cargo-gpu)	6m 58s
test_success	4s
	1h 4m 53s

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