Move entity effects definitions to shared (#35614)

* Move entity effects to shared

* relocate spawning to server

* Generic version of EntityEffect for just raising event.

* genericise everything

* oops forgot to push you

* some condensation

* finish rebas

* unwhite the space

* oops forgot nuke

* bad rebase fix

* useless annotations begone

---------

Co-authored-by: EmoGarbage404 <retron404@gmail.com>

Content.Shared/EntityEffects/Effects/Glow.cs

@@ -0,0 +1,48 @@
+using Content.Shared.EntityEffects;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Random;
+
+namespace Content.Shared.EntityEffects.Effects;
+
+/// <summary>
+///     Makes a mob glow.
+/// </summary>
+public sealed partial class Glow : EntityEffect
+{
+    [DataField]
+    public float Radius = 2f;
+
+    [DataField]
+    public Color Color = Color.Black;
+
+    private static readonly List<Color> Colors = new()
+    {
+        Color.White,
+        Color.Red,
+        Color.Yellow,
+        Color.Green,
+        Color.Blue,
+        Color.Purple,
+        Color.Pink
+    };
+
+    public override void Effect(EntityEffectBaseArgs args)
+    {
+        if (Color == Color.Black)
+        {
+            var random = IoCManager.Resolve<IRobustRandom>();
+            Color = random.Pick(Colors);
+        }
+
+        var lightSystem = args.EntityManager.System<SharedPointLightSystem>();
+        var light = lightSystem.EnsureLight(args.TargetEntity);
+        lightSystem.SetRadius(args.TargetEntity, Radius, light);
+        lightSystem.SetColor(args.TargetEntity, Color, light);
+        lightSystem.SetCastShadows(args.TargetEntity, false, light); // this is expensive, and botanists make lots of plants
+    }
+
+    protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys)
+    {
+        return "TODO";
+    }
+}