feat: add concurrent working threads option to CLI args #61

Job	Run time
clippy-checks	49s
rustfmt-nightly-check	10s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-gnu)	38s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-gnu)	4m 21s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-pc-windows-msvc)	2m 53s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-pc-windows-msvc)	43s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-apple-darwin)	1m 11s
build-and-test / build-artifacts-and-run-tests (false, false, false, x86_64-unknown-linux-musl)	54s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-gnu)	3m 21s
build-and-test / build-artifacts-and-run-tests (false, false, false, aarch64-unknown-linux-musl)	2m 50s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-gnueabihf)	3m 36s
build-and-test / build-artifacts-and-run-tests (false, false, false, armv7-unknown-linux-musleabihf)	3m 6s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	31s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	25s
build-and-test / build-artifacts-and-run-tests (true, x86_64-unknown-linux-gnu)	29s
	25m 57s

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