Add microwave recipes to the guidebook (#34105)

Content.Shared/Kitchen/MicrowaveMealRecipePrototype.cs

@@ -19,6 +19,9 @@ namespace Content.Shared.Kitchen
         [DataField("name")]
         private string _name = string.Empty;
 
+        [DataField]
+        public string Group = "Other";
+
         [DataField("reagents", customTypeSerializer:typeof(PrototypeIdDictionarySerializer<FixedPoint2, ReagentPrototype>))]
         private Dictionary<string, FixedPoint2> _ingsReagents = new();