fix(cli): prevent help pipe panic #7996

Job	Run time
optimize-ci	3s
detect-changes	5s
Lint	49s
Test (Linux x64 musl)	3m 7s
Test (windows-latest, x86_64-pc-windows-msvc)	4m 37s
Test (namespace-profile-linux-x64-default, x86_64-unknown-linux-gnu)	1m 14s
Test (macos-latest, aarch64-apple-darwin)	2m 14s
download-previous-rolldown-binaries	11s
CLI E2E test (Linux x64 musl)	1m 7s
CLI E2E test (windows-latest, x86_64-pc-windows-msvc)	4m 40s
CLI E2E test (namespace-profile-linux-x64-default, x86_64-unknown-linux-gnu)	1m 57s
CLI E2E test (macos-latest, aarch64-apple-darwin)	2m 55s
Local CLI `vp install` E2E test	-1s
CLI snap test (aarch64-apple-darwin, 1/3)	2m 1s
CLI snap test (x86_64-pc-windows-msvc, 2/3)	4m 25s
CLI snap test (x86_64-unknown-linux-gnu, 1/3)	2m 0s
CLI snap test (aarch64-apple-darwin, 2/3)	1m 47s
CLI snap test (x86_64-unknown-linux-gnu, 2/3)	3m 55s
CLI snap test (x86_64-unknown-linux-gnu, 3/3)	1m 6s
CLI snap test (x86_64-pc-windows-msvc, 3/3)	4m 26s
CLI snap test (aarch64-apple-darwin, 3/3)	26s
CLI snap test (x86_64-pc-windows-msvc, 1/3)	4m 39s
done	4s
	47m 47s

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