feat(cli): add plugin (#304)

plugins/cli/src/error.rs

@@ -0,0 +1,16 @@
+use serde::{Serialize, Serializer};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("failed to parse arguments: {0}")]
+    ParseCli(#[from] clap::Error),
+}
+
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}