chore: add error message helper (#2247)

Author: mattsse

crates/signer/src/error.rs

@@ -1,6 +1,6 @@
 use alloy_primitives::{hex, ChainId};
 use k256::ecdsa;
-use std::fmt;
+use std::{fmt, fmt::Display};
 use thiserror::Error;
 
 /// Result type alias for [`Error`](enum@Error).
@@ -47,6 +47,12 @@ impl Error {
         Self::Other(error.into())
     }
 
+    /// Constructs a new [`Other`](Self::Other) with an error message.
+    #[cold]
+    pub fn message(err: impl Display) -> Self {
+        Self::Other(err.to_string().into())
+    }
+
     /// Returns `true` if the error is [`UnsupportedOperation`](Self::UnsupportedOperation).
     #[inline]
     pub const fn is_unsupported(&self) -> bool {