Alerts for breathing plasma/tritium (#24484)

* Alert autoremove v0

* Code cleanup and timing

* comment

* Tritium, code compression

* not resolving manually

* reduced lookups, new comp

* fix-fix yes

* use RemCompDeferred, handle OnUnpaused

* missed a todo

* entitysystem resolve

* remove unnecessary component updates

* remove AlertState from comp, move EntityUnpausedEvent actions to AlertStateComponent's Timespan

* Code cleanup

* comments

* combines AutoRemove input into Clear

* minor logic adjustment that does not really change anything but is less ambiguous

Content.Shared/Alert/AlertState.cs

@@ -7,5 +7,7 @@ public struct AlertState
 {
     public short? Severity;
     public (TimeSpan, TimeSpan)? Cooldown;
+    public bool AutoRemove;
+    public bool ShowCooldown;
     public AlertType Type;
-}
+}