Cult spells update (#607)

* - add: CultSystem.BloodSpells.

* - add: Cleanup.

Content.Server/_White/Cult/UI/OpenBloodSpellsUi.cs

@@ -0,0 +1,21 @@
+using Content.Server.EUI;
+using Content.Shared.Alert;
+using JetBrains.Annotations;
+using Robust.Shared.Player;
+
+namespace Content.Server._White.Cult.UI;
+
+[UsedImplicitly, DataDefinition]
+public sealed partial class OpenBloodSpellsUi : IAlertClick
+{
+    public void AlertClicked(EntityUid player)
+    {
+        var euiManager = IoCManager.Resolve<EuiManager>();
+        var entManager = IoCManager.Resolve<IEntityManager>();
+
+        if (!entManager.TryGetComponent(player, out ActorComponent? actor))
+            return;
+
+        euiManager.OpenEui(new CultBloodSpellsEui(player, entManager), actor.PlayerSession);
+    }
+}