Added 'Comment' operation for annotating the recipe

src/core/FlowControl.js

@@ -193,6 +193,20 @@ const FlowControl = {
         return state;
     },
 
+
+    /**
+     * Comment operation.
+     * 
+     * @param {Object} state - The current state of the recipe.
+     * @param {number} state.progress - The current position in the recipe.
+     * @param {Dish} state.dish - The Dish being operated on.
+     * @param {Operation[]} state.opList - The list of operations in the recipe.
+     * @returns {Object} The updated state of the recipe.
+     */
+    runComment: function(state) {
+        return state;
+    },
+
 };
 
 export default FlowControl;