feat(wasm-utxo): implement Clone trait properly for WrapPsbt

Implemented Clone trait for WrapPsbt to provide proper cloning functionality
and addressed clippy lint warnings about manually implementing the trait
method.

Issue: BTC-2652

Co-authored-by: llm-git <[email protected]>

Author: OttoAllmendinger

packages/wasm-utxo/src/psbt.rs

@@ -86,8 +86,9 @@ impl WrapPsbt {
         self.0.serialize()
     }
 
+    #[allow(clippy::should_implement_trait)]
     pub fn clone(&self) -> WrapPsbt {
-        WrapPsbt(self.0.clone())
+        Clone::clone(self)
     }
 
     #[wasm_bindgen(js_name = updateInputWithDescriptor)]
@@ -165,6 +166,12 @@ impl WrapPsbt {
     }
 }
 
+impl Clone for WrapPsbt {
+    fn clone(&self) -> Self {
+        WrapPsbt(self.0.clone())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use crate::psbt::SingleKeySigner;