added storage library

backend/storage/src/error.rs

@@ -0,0 +1,11 @@
+use azure_core::error::HttpError;
+
+#[derive(Debug, thiserror::Error)]
+pub enum AdapterError {
+    #[error("Azure error: {0}")]
+    Azure(#[from] azure_core::Error),
+    #[error("HTTP error: {0}")]
+    Http(#[from] HttpError),
+    #[error("Serialization error: {0}")]
+    Serialization(String),
+}