Add trait bound for std::error::Error (#17)

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Closes #

## Introduced changes

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- Add trait bound for std::error::Error so somebody can use `?` operator

## Checklist

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- [ ] Linked relevant issue
- [ ] Updated relevant documentation
- [ ] Added relevant tests
- [x] Performed self-review of the code
- [ ] Added changes to `CHANGELOG.md`

Cargo.toml

@@ -12,6 +12,7 @@ edition = "2021"
 cairo-lang-sierra-to-casm = "2.8.2"
 cairo-lang-sierra = "2.8.2"
 camino = { version = "1.1.9", features = ["serde1"] }
+thiserror = "1.0.64"
 derive_more = { version = "1.0.0", features = ["add", "add_assign", "mul", "mul_assign"] }
 serde = { version = "1.0.195", features = ["derive"] }
 serde_json = "1.0.128"

crates/cairo-annotations/Cargo.toml

@@ -7,6 +7,7 @@ edition.workspace = true
 cairo-lang-sierra-to-casm.workspace = true
 cairo-lang-sierra.workspace = true
 camino.workspace = true
+thiserror.workspace = true
 derive_more.workspace = true
 serde.workspace = true
 serde_json.workspace = true

crates/cairo-annotations/src/annotations/traits.rs

@@ -1,8 +1,9 @@
 use cairo_lang_sierra::debug_info::DebugInfo;
 use serde::de::DeserializeOwned;
+use thiserror::Error;
 
 pub trait TryFromDebugInfo: Sized {
-    type Error;
+    type Error: std::error::Error;
 
     /// Attempt to create an instance of the implementing type from the provided sierra `DebugInfo`.
     /// # Errors
@@ -12,12 +13,15 @@ pub trait TryFromDebugInfo: Sized {
 }
 
 /// Enum representing the possible errors that can occur when trying to create an annotation from sierra debug information.
-#[derive(Debug)]
+#[derive(Debug, Error)]
 pub enum AnnotationsError {
-    /// Error indicating that the namespace is missing from the annotations. Contains the missing namespace.
+    /// Error indicating that the namespace is missing from the annotations.
+    #[error("Missing namespace: {0}")]
     MissingNamespace(String),
-    /// Error indicating that the deserialization of the annotation failed. Contains the deserialization error.
-    DeserializationError(serde_json::Error),
+
+    /// Error indicating that the deserialization of the annotation failed.
+    #[error("Deserialization error: {0}")]
+    DeserializationError(#[from] serde_json::Error),
 }
 
 pub(crate) trait Namespace {