feat: add xshell

__shell/xshell/src/main.rs

@@ -0,0 +1,11 @@
+use xshell::{cmd, read_file};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let name = "World";
+    let output = cmd!("echo Hello {name}!").read()?;
+    println!("{}", output);
+
+    let err = read_file("feeling-lucky.txt").unwrap_err();
+    println!("cannot read file: {}", err);
+    Ok(())
+}