Add container-related triggers (#39647)

* added triggers for when an entity is inserted or removed from a container, for both the entity and the container

* removed unnecessary comments

* consolidated into one shared system for all four triggers

* consolidated into one shared system for all four triggers

* named it right this time

* made container owner user of got triggers and added guard statements

* container id

* Update Content.Shared/Trigger/Components/Triggers/TriggerOnRemovedFromContainerComponent.cs

---------

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

Content.Shared/Trigger/Components/Triggers/TriggerOnInsertedIntoContainerComponent.cs

@@ -0,0 +1,18 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Trigger.Components.Triggers;
+
+/// <summary>
+/// Triggers an entity when something is inserted into it.
+/// The user is the entity being inserted into the container.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class TriggerOnInsertedIntoContainerComponent : BaseTriggerOnXComponent
+{
+    /// <summary>
+    /// The container to the entity has to be inserted into.
+    /// Null will allow all containers.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public string? ContainerId;
+}