implement (rules) list api

src/list.rs

@@ -95,4 +95,13 @@ impl List {
     pub async fn cache_clean(&self) -> Result<Option<Vec<String>>> {
         self.cache.clean().await
     }
+    /// Return active rules (from server memory)
+    pub async fn list(&self) -> Vec<String> {
+        self.index
+            .read()
+            .await
+            .iter()
+            .map(|item| item.to_string())
+            .collect()
+    }
 }