egg rework (#21606)

* egg and raw egg

* add DamageEntity

* boiling and exploding eggs

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/Construction/Completions/DamageEntity.cs

@@ -0,0 +1,23 @@
+using Content.Shared.Construction;
+using Content.Shared.Damage;
+using Content.Shared.Damage.Systems;
+
+namespace Content.Server.Construction.Completions;
+
+/// <summary>
+/// Damage the entity on step completion.
+/// </summary>
+[DataDefinition]
+public sealed partial class DamageEntity : IGraphAction
+{
+    /// <summary>
+    /// Damage to deal to the entity.
+    /// </summary>
+    [DataField]
+    public DamageSpecifier Damage;
+
+    public void PerformAction(EntityUid uid, EntityUid? userUid, IEntityManager entityManager)
+    {
+        entityManager.System<DamageableSystem>().TryChangeDamage(uid, Damage, origin: userUid);
+    }
+}