CICD

chore: add `rust-analyzer` to nix shell #7

Job	Run time
Extract crate metadata	10s
Run tests and checks (ubuntu-20.04, 1.70)	1m 30s
Run tests and checks (ubuntu-20.04, nightly)	1m 1s
Run tests and checks (ubuntu-20.04, stable)	1m 20s
Run tests and checks (macos-12, stable)	1m 41s
Run tests and checks (windows-2019, stable)	2m 34s
Build release binaries	0s
Create GitHub release	0s
	8m 16s

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