Cargo

Refactor CPI code for ABIv2 #66

Job	Run time
clippy-nightly (macos-15)	19m 26s
clippy-nightly (ubuntu-24.04, docker.io/rust:1-alpine3.23, -C target-feature=-crt-static)	25m 48s
clippy-nightly (windows-2025)	-5s
	45m 9s

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