devtools: Add block hash lookups #5547

Job	Run time
Test on Linux	9m 3s
Test Orchard on Linux	10m 39s
Build target wasm32-wasi	1m 1s
Test NU6 on Linux	9m 4s
Latest build on ubuntu-latest	2m 3s
Test on macOS	14m 40s
Bitrot check	1m 47s
Latest build on windows-latest	4m 49s
Test Orchard on macOS	11m 55s
Latest build on macOS-latest	1m 57s
Test on Windows	15m 18s
Check ZFuture build on Linux	29s
Test Orchard on Windows	18m 14s
Check ZFuture build on macOS	29s
Test NU6 on Windows	16m 55s
Check ZFuture build on Windows	3m 24s
Clippy (MSRV)	1m 27s
Clippy (beta)	13s
Code coverage	20m 52s
Intra-doc links	2m 1s
Rustfmt	17s
protobuf consistency	1m 14s
UUID validity	6s
	2h 27m 57s

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