add serde de/ser impls for error

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/error/serde.rs

@@ -0,0 +1,13 @@
+use std::fmt::Display;
+
+use serde::{de, ser};
+
+use crate::Error;
+
+impl de::Error for Error {
+	fn custom<T: Display + ToString>(msg: T) -> Self { Self::SerdeDe(msg.to_string().into()) }
+}
+
+impl ser::Error for Error {
+	fn custom<T: Display + ToString>(msg: T) -> Self { Self::SerdeSer(msg.to_string().into()) }
+}