Add not builtin command - yes

src/yes.rs

@@ -0,0 +1,22 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() == 1 {
+        loop {
+            println!("y");
+        }
+    }
+    for arg in 1..args.len() {
+        match args[arg].as_str() {
+            "--help" => {
+                println!("Usage: yes");
+            },
+            arg => {
+                loop {
+                    println!("{}", arg);
+                }
+            }
+        }
+    }
+}