CLI command architecture and DB-backed model update syncing (#397)

crates/yaak/src/error.rs

@@ -0,0 +1,9 @@
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error(transparent)]
+    Send(#[from] crate::send::SendHttpRequestError),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;