feat: new method is_operator_set_quorum (#296)

### What Changed?
Add new method `is_operator_set_quorum` to `avsregistry/reader` as this
method was missing in the SDK.

Closes #272  

### Reviewer Checklist

- [ ] New features are tested and documented
- [ ] PR updates the changelog with a description of changes
- [ ] PR has one of the `changelog-X` labels (if applies)
- [ ] Code deprecates any old functionality before removing it

---------

Co-authored-by: Tomás Grüner <[email protected]>

Author: damiramirez

CHANGELOG.md

@@ -74,6 +74,10 @@ Those changes in added, changed or breaking changes, should include usage exampl
         .await
         .unwrap();
   ```
+* Added new method `is_operator_set_quorum` in `avsregistry/writer` in [#296](https://github.com/Layr-Labs/eigensdk-rs/pull/296).
+  ```rust
+    let operator_set_quourm = avs_reader.is_operator_set_quorum(0).await.unwrap();
+  ```
 
 ### Changed
 * Changes in the way bindings are generated in [#243](https://github.com/Layr-Labs/eigensdk-rs/pull/243).

crates/chainio/clients/avsregistry/src/reader.rs

@@ -11,7 +11,7 @@ use eigen_crypto_bls::{
 };
 use eigen_logging::logger::SharedLogger;
 use eigen_types::operator::{
-    bitmap_to_quorum_ids, bitmap_to_quorum_ids_from_u192, OperatorPubKeys,
+    bitmap_to_quorum_ids, bitmap_to_quorum_ids_from_u192, OperatorPubKeys, QuorumNum,
 };
 
 use eigen_utils::slashing::middleware::blsapkregistry::BLSApkRegistry;
@@ -627,6 +627,31 @@ impl AvsRegistryChainReader {
         }
         Ok(operator_id_to_socket)
     }
+
+    /// Check if a quorum is an operator set quorum
+    ///
+    /// # Arguments
+    /// * `quorum_number` - The quorum number to query.
+    ///
+    /// # Returns
+    /// [`true`] if the quorum is an operator set quorum, [`false`] otherwise.
+    pub async fn is_operator_set_quorum(
+        &self,
+        quorum_number: QuorumNum,
+    ) -> Result<bool, AvsRegistryError> {
+        let provider = get_provider(&self.provider);
+
+        let contract_stake_registry = StakeRegistry::new(self.stake_registry_addr, &provider);
+
+        let quorum_status = contract_stake_registry
+            .isOperatorSetQuorum(quorum_number)
+            .call()
+            .await?;
+
+        let StakeRegistry::isOperatorSetQuorumReturn { _0: quorum_status } = quorum_status;
+
+        Ok(quorum_status)
+    }
 }
 
 #[cfg(test)]
@@ -824,4 +849,14 @@ mod tests {
             .unwrap();
         assert!(!is_registered);
     }
+
+    #[tokio::test]
+    async fn test_is_operator_set_quorum() {
+        let (_container, http_endpoint, _ws_endpoint) = start_anvil_container().await;
+        let avs_reader = build_avs_registry_chain_reader(http_endpoint.clone()).await;
+
+        let operator_set_quourm = avs_reader.is_operator_set_quorum(0).await.unwrap();
+
+        assert!(operator_set_quourm);
+    }
 }