Entity Tables (EntitySpawnEntry replacement) (#30579)

* Entity table code

* entity table examples

* fix dat shit

* access

* tests tests tests

* sloth review

Content.Shared/Containers/EntityTableContainerFillComponent.cs

@@ -0,0 +1,13 @@
+using Content.Shared.EntityTable.EntitySelectors;
+
+namespace Content.Shared.Containers;
+
+/// <summary>
+/// Version of <see cref="ContainerFillComponent"/> that utilizes <see cref="EntityTableSelector"/>
+/// </summary>
+[RegisterComponent, Access(typeof(ContainerFillSystem))]
+public sealed partial class EntityTableContainerFillComponent : Component
+{
+    [DataField]
+    public Dictionary<string, EntityTableSelector> Containers = new();
+}