refactor(proto): replace anyhow with thiserror in writers

proto/src/writer/errors.rs

@@ -0,0 +1,11 @@
+use thiserror::Error;
+use tokio::io;
+use crate::message::errors::ProtoSerializeError;
+
+#[derive(Debug, Error)]
+pub enum ProtoWriteError {
+    #[error("writing to socket failed")]
+    Io(#[from] io::Error),
+    #[error("serialization of inner data failed")]
+    Serialize(#[from] ProtoSerializeError),
+}