list files and directories in the current directory or the requested directory

# Tools

```cargo

serde = "1.0.140"

anyhow = "1.0.58"

tokio = { version = "1", features = ["full"] }

color-eyre = "0.6.2"

tracing = "0.1.35"

tracing-subscriber = "0.3.15"

chrono = "0.4"

derive_builder = "0.12.0"

```