Add README and examples

examples/serde_text.rs

@@ -0,0 +1,30 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+struct ServiceConfig {
+    name: String,
+    enabled: bool,
+    retries: i64,
+    endpoints: Vec<String>,
+}
+
+fn main() -> wson::Result<()> {
+    let value = ServiceConfig {
+        name: "worker".to_string(),
+        enabled: true,
+        retries: 3,
+        endpoints: vec![
+            "https://a.example".to_string(),
+            "https://b.example".to_string(),
+        ],
+    };
+
+    let text = wson::to_string(&value)?;
+    println!("text: {text}");
+
+    let decoded: ServiceConfig = wson::from_str(&text)?;
+    assert_eq!(decoded, value);
+    println!("round trip ok");
+
+    Ok(())
+}