5 new triggers: EmptyContainers, Knockdown, Stun, TriggerOnThrowDoHit (#41472)

* ideas

* finish components

* systems

* one more

* requested

---------

Co-authored-by: iaada <iaada@users.noreply.github.com>

Content.Shared/Trigger/Components/Effects/CleanContainersOnTriggerComponent.cs

@@ -0,0 +1,22 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Trigger.Components.Effects;
+
+/// <summary>
+/// Trigger effect for removing and *deleting* all items in container(s) on the target.
+/// </summary>
+/// <remarks>
+/// Be very careful when setting <see cref="BaseXOnTriggerComponent.TargetUser"/> to true or all your organs might fall out.
+/// In fact, never set it to true.
+/// </remarks>
+/// <seealso cref="EmptyContainersOnTriggerComponent"/>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class CleanContainersOnTriggerComponent : BaseXOnTriggerComponent
+{
+    /// <summary>
+    /// Names of containers to empty.
+    /// If null, all containers will be emptied.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public List<string>? Container;
+}