Move some of the new singularity code into shared

Hopefully without explosions yay

Content.Shared/Singularity/EntitySystems/SharedSingularityGeneratorSystem.cs

@@ -0,0 +1,29 @@
+using Content.Shared.Emag.Systems;
+using Content.Shared.Popups;
+using Content.Shared.Singularity.Components;
+
+namespace Content.Shared.Singularity.EntitySystems;
+
+/// <summary>
+/// Shared part of SingularitySingularityGeneratorSystem
+/// </summary>
+public abstract class SharedSingularityGeneratorSystem : EntitySystem
+{
+    #region Dependencies
+    [Dependency] protected readonly SharedPopupSystem PopupSystem = default!;
+    #endregion Dependencies
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<SingularityGeneratorComponent, GotEmaggedEvent>(OnEmagged);
+    }
+
+    private void OnEmagged(EntityUid uid, SingularityGeneratorComponent component, ref GotEmaggedEvent args)
+    {
+        PopupSystem.PopupEntity(Loc.GetString("comp-generator-failsafe-disabled", ("target", uid)), uid);
+        component.FailsafeDisabled = true;
+        args.Handled = true;
+    }
+}