refactor: improve CLI value parsing/docs #389

Job	Run time
Build FreeBSD	4m 7s
Build x86_64-unknown-linux-gnu	3m 26s
Build aarch64-pc-windows-msvc	4m 59s
Build aarch64-unknown-linux-gnu	4m 1s
Build x86_64-apple-darwin	3m 10s
Build x86_64-unknown-linux-musl	4m 20s
Build aarch64-apple-darwin	3m 0s
Build x86_64-pc-windows-msvc	4m 37s
Build aarch64-unknown-linux-musl	4m 13s
Build armv7-unknown-linux-gnueabihf	3m 36s
Build i686-pc-windows-msvc	4m 31s
Test x86_64-pc-windows-msvc - node@22	39s
Test x86_64-unknown-linux-musl - node@22	32s
Test aarch64-apple-darwin - node@20	16s
Test x86_64-apple-darwin - node@22	52s
Test x86_64-pc-windows-msvc - node@20	35s
Test x86_64-unknown-linux-gnu - node@20	19s
Test aarch64-unknown-linux-gnu - node@22	41s
Test aarch64-unknown-linux-musl - node@22	37s
Test x86_64-unknown-linux-gnu - node@22	32s
Test x86_64-apple-darwin - node@20	2m 6s
Test aarch64-unknown-linux-musl - node@20	34s
Test aarch64-unknown-linux-gnu - node@20	40s
Test aarch64-pc-windows-msvc - node@22	1m 23s
Test aarch64-pc-windows-msvc - node@20	1m 0s
Test armv7-unknown-linux-gnueabihf - node@20	45s
Test x86_64-unknown-linux-musl - node@20	32s
Test aarch64-apple-darwin - node@22	30s
Test armv7-unknown-linux-gnueabihf - node@22	50s
Publish	21s
	57m 44s

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