Cult spells update (#607)

* - add: CultSystem.BloodSpells.

* - add: Cleanup.

Content.Client/_White/Cult/UI/CultBloodSpellsEui/CultBloodSpellsEui.cs

@@ -0,0 +1,57 @@
+using Content.Client.Eui;
+using Content.Shared._White.Cult.UI;
+using JetBrains.Annotations;
+using Robust.Client.Graphics;
+
+namespace Content.Client._White.Cult.UI.CultBloodSpellsEui;
+
+[UsedImplicitly]
+public sealed class CultBloodSpellsEui : BaseEui
+{
+    private readonly CultBloodSpellsMenu _menu;
+    private bool _messageSent;
+
+    public CultBloodSpellsEui()
+    {
+        _menu = new CultBloodSpellsMenu();
+
+        _menu.OnClose += () =>
+        {
+            if (_messageSent)
+                return;
+            SendMessage(new BloodSpellMessage(BloodSpellMessageState.Cancel));
+            _messageSent = true;
+        };
+
+        _menu.RemoveButton.OnPressed += _ =>
+        {
+            Send(BloodSpellMessageState.Remove);
+        };
+
+        _menu.CreateButton.OnPressed += _ =>
+        {
+            Send(BloodSpellMessageState.Create);
+        };
+    }
+
+    private void Send(BloodSpellMessageState state)
+    {
+        SendMessage(new BloodSpellMessage(state));
+        _messageSent = true;
+        _menu.Close();
+    }
+
+    public override void Opened()
+    {
+        IoCManager.Resolve<IClyde>().RequestWindowAttention();
+        _menu.OpenCentered();
+    }
+
+    public override void Closed()
+    {
+        base.Closed();
+
+        _menu.Close();
+    }
+
+}