Add (near) automatic testing for command examples (#1777)

crates/nu-cli/src/lib.rs

@@ -28,6 +28,9 @@ mod shell;
 mod stream;
 pub mod utils;
 
+#[cfg(test)]
+mod examples;
+
 pub use crate::cli::{
     cli, create_default_context, load_plugins, run_pipeline_standalone, run_vec_of_pipelines,
 };