find/xargs --help/--version >/dev/full panics

POSIX-compliant

xargs: support -l option

xargs: support -E/--eof flag

build: Do not build `testing-commandline` by cargo build

Add release-fast profile to Cargo.toml

Port findutils to use uutests

fix blocks.div_ceil(len, bs)

Improve job name: " build-local-artifacts (${{ join(matrix.targets, ', ') }}) "

ci: Some workflows have problems during the dependency installation phase.