feat: add concurrent working threads option to CLI args #58

Job	Run time
rustfmt-nightly-check	11s
clippy-checks	54s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-gnu)	26s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-gnu)	3m 4s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-msvc)	2m 14s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-pc-windows-msvc)	35s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-apple-darwin)	1m 40s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-musl)	1m 7s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-gnu)	3m 28s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-musl)	2m 49s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-gnueabihf)	3m 50s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-musleabihf)	3m 1s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 56s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 33s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 37s
	28m 25s

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