feat: embed docs for flags/arguments for `-h`/`--help` #836

Job	Run time
plan	15s
build-local-artifacts (aarch64-apple-darwin)	3m 25s
build-local-artifacts (aarch64-unknown-linux-gnu)	3m 11s
build-local-artifacts (x86_64-apple-darwin)	4m 40s
build-local-artifacts (x86_64-pc-windows-msvc)	6m 2s
build-local-artifacts (x86_64-unknown-linux-gnu)	1m 45s
build-global-artifacts	19s
host	0s
publish-npm	0s
announce	0s
	19m 37s

Provide feedback