refactor: improve CLI value parsing/docs #388

Job	Run time
Build FreeBSD	4m 11s
Build x86_64-unknown-linux-gnu	3m 15s
Build i686-pc-windows-msvc	4m 15s
Build x86_64-unknown-linux-musl	4m 20s
Build x86_64-pc-windows-msvc	4m 29s
Build aarch64-pc-windows-msvc	4m 38s
Build aarch64-unknown-linux-gnu	3m 40s
Build aarch64-unknown-linux-musl	4m 9s
Build armv7-unknown-linux-gnueabihf	3m 29s
Build x86_64-apple-darwin	3m 23s
Build aarch64-apple-darwin	3m 16s
Test x86_64-apple-darwin - node@20	50s
Test aarch64-apple-darwin - node@22	20s
Test x86_64-unknown-linux-gnu - node@20	25s
Test aarch64-pc-windows-msvc - node@20	1m 26s
Test x86_64-pc-windows-msvc - node@22	1m 6s
Test x86_64-unknown-linux-gnu - node@22	21s
Test x86_64-pc-windows-msvc - node@20	52s
Test aarch64-pc-windows-msvc - node@22	59s
Test aarch64-unknown-linux-gnu - node@20	34s
Test aarch64-apple-darwin - node@20	29s
Test armv7-unknown-linux-gnueabihf - node@20	49s
Test armv7-unknown-linux-gnueabihf - node@22	51s
Test aarch64-unknown-linux-musl - node@20	36s
Test x86_64-unknown-linux-musl - node@20	22s
Test x86_64-unknown-linux-musl - node@22	26s
Test x86_64-apple-darwin - node@22	55s
Test aarch64-unknown-linux-musl - node@22	37s
Test aarch64-unknown-linux-gnu - node@22	35s
Publish	20s
	55m 58s

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