Impl copy_to for Database impl in JS bindings

bindings/javascript/src/lib.rs

@@ -516,4 +516,7 @@ impl turso_core::DatabaseStorage for DatabaseFile {
         let c = self.file.truncate(len, c)?;
         Ok(c)
     }
+    fn copy_to(&self, io: &dyn turso_core::IO, path: &str) -> turso_core::Result<()> {
+        self.file.copy_to(io, path)
+    }
 }