tools: add workflow to review Nix changes #350

Job	Run time
Build slim tarball	1m 10s
aarch64-linux: Cache V8 build	25s
x86_64-darwin: with shared libraries	42m 37s
x86_64-linux: with shared libraries	31m 7s
aarch64-darwin: with shared libraries	28m 10s
aarch64-linux: with shared openssl-3.6.1	25m 49s
aarch64-linux: with shared openssl-1.1.1w	25m 49s
aarch64-linux: with shared openssl-3.0.19	26m 24s
aarch64-linux: with shared openssl-4.0.0	25m 49s
aarch64-linux: with shared openssl-3.5.5	26m 26s
	3h 53m 46s

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