Added serde example

examples/serde.rs

@@ -0,0 +1,15 @@
+use similar::TextDiff;
+
+fn main() {
+    let diff = TextDiff::from_lines(
+        "Hello World\nThis is the second line.\nThis is the third.",
+        "Hallo Welt\nThis is the second line.\nThis is life.\nMoar and more",
+    );
+
+    let all_changes = diff
+        .ops()
+        .iter()
+        .flat_map(|op| diff.iter_changes(op))
+        .collect::<Vec<_>>();
+    println!("{}", serde_json::to_string_pretty(&all_changes).unwrap());
+}