light refactoring/rework (#19314)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Light/Components/SharedEmergencyLightComponent.cs

@@ -0,0 +1,26 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Light.Components;
+
+/// <summary>
+/// Handles station alert level and power changes for emergency lights.
+/// All logic is serverside, animation is handled by <see cref="RotatingLightComponent"/>.
+/// </summary>
+[Access(typeof(SharedEmergencyLightSystem))]
+public abstract partial class SharedEmergencyLightComponent : Component
+{
+}
+
+[Serializable, NetSerializable]
+public enum EmergencyLightVisuals
+{
+    On,
+    Color
+}
+
+public enum EmergencyLightVisualLayers
+{
+    Base,
+    LightOff,
+    LightOn,
+}