Expose Display, Debug, and Eq for HRN bindings

Following the LDK 0.2-upgrade and the addition of a Display
implementation for HumanReadableName in rust-lightning#3829, this
commit exposes the Display, Debug, and Eq traits to UniFFI.

This allows downstream users (Swift, Kotlin, Python) to compare
names and print BIP 353 formatted strings natively. Added unit
tests to verify trait implementation and BIP 353 prefix rendering.

Author: chuksys

src/ffi/types.rs

@@ -382,7 +382,8 @@ impl std::fmt::Display for Offer {
 /// This struct can also be used for LN-Address recipients.
 ///
 /// [Homograph Attacks]: https://en.wikipedia.org/wiki/IDN_homograph_attack
-#[derive(uniffi::Object)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, uniffi::Object)]
+#[uniffi::export(Debug, Display, Eq)]
 pub struct HumanReadableName {
 	pub(crate) inner: LdkHumanReadableName,
 }
@@ -439,6 +440,12 @@ impl AsRef<LdkHumanReadableName> for HumanReadableName {
 	}
 }
 
+impl std::fmt::Display for HumanReadableName {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f, "{}", self.inner)
+	}
+}
+
 /// A `Refund` is a request to send an [`Bolt12Invoice`] without a preceding [`Offer`].
 ///
 /// Typically, after an invoice is paid, the recipient may publish a refund allowing the sender to
@@ -1987,4 +1994,21 @@ mod tests {
 
 		assert_eq!(ldk_invoice.signable_hash().to_vec(), wrapped_invoice.signable_hash());
 	}
+
+	#[test]
+	fn test_hrn_traits() {
+		let encoded = "alice@lightning.space";
+		let hrn1 = HumanReadableName::from_encoded(encoded).unwrap();
+		let hrn2 = HumanReadableName::from_encoded(encoded).unwrap();
+
+		assert_eq!(hrn1.to_string(), "₿alice@lightning.space");
+
+		assert_eq!(hrn1, hrn2);
+
+		let debug_output = format!("{:?}", hrn1);
+		assert!(debug_output.contains("HumanReadableName"));
+
+		let hrn3 = hrn1;
+		assert_eq!(hrn1, hrn3);
+	}
 }