`lscpu`: Read CPU information from `sysfs` #785

Job	Run time
cargo fmt --all -- --check	7s
cargo check (ubuntu-latest)	20s
cargo clippy -- -D warnings (ubuntu-latest)	18s
cargo clippy -- -D warnings (macOS-latest)	27s
cargo check (macOS-latest)	29s
cargo clippy -- -D warnings (windows-latest)	1m 55s
cargo check (windows-latest)	1m 55s
cargo test (ubuntu-latest)	31s
cargo test (macOS-latest)	55s
Code Coverage (ubuntu-latest, unix)	1m 51s
cargo test (windows-latest)	3m 44s
Code Coverage (macos-latest, macos)	2m 23s
Code Coverage (windows-latest, windows)	4m 40s
	19m 35s

Provide feedback