Emp more effects (#14550)

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Shared/Emp/SharedEmpSystem.cs

@@ -0,0 +1,10 @@
+using Robust.Shared.Timing;
+
+namespace Content.Shared.Emp;
+
+public abstract class SharedEmpSystem : EntitySystem
+{
+    [Dependency] protected readonly IGameTiming Timing = default!;
+
+    protected const string EmpDisabledEffectPrototype = "EffectEmpDisabled";
+}