ActionGroup-based serialization format for Orchard v6 #427

Job	Run time
Latest build on ubuntu-latest	1m 17s
Check ZFuture build on Linux	20s
Latest build on windows-latest	3m 42s
Check ZFuture build on macOS	37s
Latest build on macOS-latest	1m 22s
Bitrot check	1m 19s
Check ZFuture build on Windows	5m 13s
Clippy (MSRV)	1m 17s
Build target wasm32-wasi	1m 9s
Test on Linux	7m 46s
Test Orchard on Linux	8m 7s
Test NU6 on Linux	8m 28s
Clippy (beta)	19s
Test on macOS	7m 2s
Test Orchard on macOS	7m 48s
Code coverage	6m 50s
Test on Windows	14m 55s
Test Orchard on Windows	14m 12s
Intra-doc links	2m 14s
Test NU6 on Windows	14m 1s
Rustfmt	16s
protobuf consistency	1m 7s
UUID validity	7s
	1h 49m 28s

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