[Entity] Brig Timers (#15285)

* brigtimer

* ok

* TextScreen w timer implementation

* second commit

* working brig timer

* signal timers near completion

* soon done

* removed licenses, fixes noRotation on screens, minor edits

* no message

* no message

* removed my last todos

* removed csproj.rej??

* missed a thing with .yml and tests

* fix tests

* Update base_structureairlocks.yml

* timespan type serialize

* activation turned into comp

* sloth review

* Update timer.yml

* small changes

---------

Co-authored-by: CommieFlowers <rasmus.cedergren@hotmail.com>
Co-authored-by: rolfero <45628623+rolfero@users.noreply.github.com>

Content.Server/MachineLinking/Components/ActiveSignalTimerComponent.cs

@@ -0,0 +1,15 @@
+
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Server.MachineLinking.Components
+{
+    [RegisterComponent]
+    public sealed class ActiveSignalTimerComponent : Component
+    {
+        /// <summary>
+        ///     The time the timer triggers.
+        /// </summary>
+        [DataField("triggerTime", customTypeSerializer: typeof(TimeOffsetSerializer))]
+        public TimeSpan TriggerTime;
+    }
+}