feat: automatic conversion from anyhow::Error and access to aggregate errors

crates/mad/tests/mod.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use async_trait::async_trait;
-use notmad::{Component, Mad};
+use notmad::{Component, Mad, MadError};
 use rand::Rng;
 use tokio::sync::Mutex;
 use tokio_util::sync::CancellationToken;
@@ -137,3 +137,20 @@ async fn test_can_shutdown_gracefully() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn test_can_easily_transform_error() -> anyhow::Result<()> {
+    fn fallible() -> anyhow::Result<()> {
+        Ok(())
+    }
+
+    fn inner() -> Result<(), MadError> {
+        fallible()?;
+
+        Ok(())
+    }
+
+    inner()?;
+
+    Ok(())
+}