Add cheese & dough reactions (#5547)

* git mv

* rename CreateEntityReaction -> CreateEntityTileReaction

* cheese

* change microwave recipes

* remove unnecessary test

* TryGet->Get

Content.Server/Chemistry/ReactionEffects/CreateEntityReactionEffect.cs

@@ -0,0 +1,42 @@
+using Content.Shared.Chemistry.Reagent;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Chemistry.ReactionEffects;
+
+[DataDefinition]
+public class CreateEntityReactionEffect : ReagentEffect
+{
+    /// <summary>
+    ///     What entity to create.
+    /// </summary>
+    [DataField("entity", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<EntityPrototype>))]
+    public string Entity = default!;
+
+    /// <summary>
+    ///     How many entities to create per unit reaction.
+    /// </summary>
+    [DataField("number")]
+    public uint Number = 1;
+
+    public override void Effect(ReagentEffectArgs args)
+    {
+        var transform = args.EntityManager.GetComponent<TransformComponent>(args.SolutionEntity);
+        var quantity = Number * args.Quantity.Int();
+
+        for (var i = 0; i < quantity; i++)
+        {
+            args.EntityManager.SpawnEntity(Entity, transform.MapPosition);
+
+            // TODO figure out how to spawn inside of containers
+            // e.g. cheese:
+            // if the user is holding a bowl milk & enzyme, should drop to floor, not attached to the user.
+            // if reaction happens in a backpack, should insert cheese into backpack.
+            // --> if it doesn't fit, iterate through parent storage until it attaches to the grid (again, DON'T attach to players).
+            // if the reaction happens INSIDE a stomach? the bloodstream? I have no idea how to handle that.
+            // presumably having cheese materialize inside of your blood would have "disadvantages".
+        }
+    }
+}