feat: Review `c2pa-crypto` crate API #4016

Job	Run time
Default features build	21s
Doc tests (requires nightly Rust) (windows-latest)	4m 56s
Unit tests (windows-latest, stable)	4m 38s
Unit tests with minimum versions of direct dependencies (windows-latest)	3m 38s
Doc tests (requires nightly Rust) (macos-latest)	1m 53s
Unit tests (windows-latest, 1.81.0)	3m 4s
Doc tests (requires nightly Rust) (ubuntu-latest)	1m 54s
Unit tests (aarch64-unknown-linux-gnu, stable)	4m 9s
Unit tests (macos-latest, stable)	1m 53s
Unit tests (aarch64-unknown-linux-gnu, 1.81.0)	4m 29s
Unit tests with minimum versions of direct dependencies (macos-latest)	1m 21s
Unit tests (macos-latest, 1.81.0)	1m 49s
Unit tests with minimum versions of direct dependencies (ubuntu-latest)	1m 12s
Unit tests (ubuntu-latest, stable)	1m 10s
Unit tests (WASM)	2m 28s
Unit tests (ubuntu-latest, 1.81.0)	1m 21s
Enforce Rust code format	14s
Clippy	53s
Preflight docs.rs build	2m 6s
Unit tests (c2patool) (windows-latest, stable)	2m 21s
Unit tests (c2patool) (macos-latest, stable)	1m 17s
Unit tests (c2patool) (ubuntu-latest, stable)	1m 1s
License / vulnerability audit (advisories)	25s
License / vulnerability audit (bans licenses sources)	24s
Check for unused dependencies	2m 24s
	51m 21s

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