CICD

Preinitialize and cache `help` output #1276

Job	Run time
WASM version	1m 59s
Ensure 'cargo fmt' has been run	11s
Extract crate metadata	5s
Documentation checks	5m 21s
Minimum supported rust version	2m 7s
aarch64-unknown-linux-gnu (ubuntu-20.04)	3m 56s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	3m 47s
arm-unknown-linux-musleabihf (ubuntu-20.04)	3m 54s
i686-pc-windows-msvc (windows-2019)	6m 59s
i686-unknown-linux-gnu (ubuntu-20.04)	3m 35s
i686-unknown-linux-musl (ubuntu-20.04)	3m 59s
x86_64-apple-darwin (macos-12)	6m 5s
x86_64-pc-windows-msvc (windows-2019)	6m 43s
x86_64-unknown-linux-gnu (ubuntu-20.04)	3m 28s
x86_64-unknown-linux-musl (ubuntu-20.04)	3m 36s
	55m 45s

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