Disposals air + new atmos expose event (#6798)

Co-authored-by: Vera Aguilera Puerto <6766154+Zumorica@users.noreply.github.com>

Content.Server/Disposal/Unit/Components/BeingDisposedComponent.cs

@@ -0,0 +1,11 @@
+namespace Content.Server.Disposal.Unit.Components;
+
+/// <summary>
+///     A component added to entities that are currently in disposals.
+/// </summary>
+[RegisterComponent]
+public sealed class BeingDisposedComponent : Component
+{
+    [ViewVariables]
+    public EntityUid Holder;
+}