feat: add concurrent working threads option to CLI args #64

Job	Run time
rustfmt-nightly-check	12s
clippy-checks	53s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-gnu)	37s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-gnu)	2m 11s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-msvc)	2m 11s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-pc-windows-msvc)	52s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-apple-darwin)	1m 22s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-musl)	1m 16s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-gnu)	3m 47s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-musl)	2m 47s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-gnueabihf)	3m 34s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-musleabihf)	3m 3s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 49s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 37s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	1m 31s
	27m 42s

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