New Feature: Slot blockers (#35172)

* First commit

* More comments

* Update

* Update

* For Beloved Maintainers

* Beck T, my beloved

* Update

* Old stuff

* Update EquipAttemptEvents.cs

* Update UnequipAttemptEvent.cs

---------

Co-authored-by: beck-thompson <107373427+beck-thompson@users.noreply.github.com>

Content.Shared/Inventory/SlotBlockComponent.cs

@@ -0,0 +1,16 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Inventory;
+
+/// <summary>
+/// Used to prevent items from being unequipped and equipped from slots that are listed in <see cref="Slots"/>.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState, Access(typeof(SlotBlockSystem))]
+public sealed partial class SlotBlockComponent : Component
+{
+    /// <summary>
+    /// Slots that this entity should block.
+    /// </summary>
+    [DataField(required: true), AutoNetworkedField]
+    public SlotFlags Slots = SlotFlags.NONE;
+}