Add methods for validating aspects of PCZT bundles #192

Job	Run time
Bitrot check	1m 53s
Latest build on ubuntu-latest	43s
Build target wasm32-wasi	1m 19s
Test on ubuntu-latest	2m 44s
Latest build on windows-latest	1m 58s
Test on windows-latest	4m 30s
Latest build on macOS-latest	44s
Test on macOS-latest	2m 17s
Clippy (MSRV)	1m 22s
Intra-doc links	1m 40s
Rustfmt	14s
	19m 24s

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