Add make ghost role verb (#3204)

Content.Server/GameObjects/Components/Observer/GhostRoles/GhostRolesEui.cs

@@ -0,0 +1,39 @@
+using Content.Server.Eui;
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.Eui;
+using Content.Shared.GameObjects.Components.Observer.GhostRoles;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Observer.GhostRoles
+{
+    public class GhostRolesEui : BaseEui
+    {
+        public override GhostRolesEuiState GetNewState()
+        {
+            return new(EntitySystem.Get<GhostRoleSystem>().GetGhostRolesInfo());
+        }
+
+        public override void HandleMessage(EuiMessageBase msg)
+        {
+            base.HandleMessage(msg);
+
+            switch (msg)
+            {
+                case GhostRoleTakeoverRequestMessage req:
+                    EntitySystem.Get<GhostRoleSystem>().Takeover(Player, req.Identifier);
+                    break;
+
+                case GhostRoleWindowCloseMessage _:
+                    Closed();
+                    break;
+            }
+        }
+
+        public override void Closed()
+        {
+            base.Closed();
+
+            EntitySystem.Get<GhostRoleSystem>().CloseEui(Player);
+        }
+    }
+}