feat(examples): add iter example

examples/iter.rs

@@ -0,0 +1,19 @@
+use orgize::Org;
+use std::env::args;
+use std::fs;
+use std::io::Result;
+
+fn main() -> Result<()> {
+    let args: Vec<_> = args().collect();
+
+    if args.len() < 2 {
+        eprintln!("Usage: {} <org-file>", args[0]);
+    } else {
+        let contents = String::from_utf8(fs::read(&args[1])?).unwrap();
+
+        for event in Org::parse(&contents).iter() {
+            println!("{:?}", event);
+        }
+    }
+    Ok(())
+}