Rust

uefi std: add example and add book chapter #5299

Job	Run time
Integration Test (IA-32)	1m 16s
Integration Test (AArch64)	1m 14s
Lints	1m 33s
Unit + Doc Tests	1m 31s
Integration Test (x86_64)	1m 35s
Integration Test (x86_64 Windows)	3m 24s
Build (feature permutations)	2m 28s
Build (stable MSRV)	29s
Build Standard Binary (nightly)	24s
Unit + Doc Tests (Miri)	1m 3s
Nightly (build, test, doc)	2m 21s
	17m 18s

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