Ghost Roles (#3106)

* Add files for Ghost Roles.

* Work on Ghost Roles

* Improvements

* GHOST ROLES IS DONE

* mmm yes

* auto-update when setting rolename/roledescription

* well

* command graceful error

* Makes UI have a scrollbar when it has too many entries

* fix command fuckup

* Apply suggestions from code review

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

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

Content.Client/GameObjects/Components/Observer/GhostRolesEui.cs

@@ -0,0 +1,54 @@
+using Content.Client.Eui;
+using Content.Shared.Eui;
+using Content.Shared.GameObjects.Components.Observer;
+using JetBrains.Annotations;
+
+namespace Content.Client.GameObjects.Components.Observer
+{
+    [UsedImplicitly]
+    public class GhostRolesEui : BaseEui
+    {
+        private readonly GhostRolesWindow _window;
+
+        public GhostRolesEui()
+        {
+            _window = new GhostRolesWindow();
+
+            _window.RoleRequested += id =>
+            {
+                SendMessage(new GhostRoleTakeoverRequestMessage(id));
+            };
+
+            _window.OnClose += () =>
+            {
+                SendMessage(new GhostRoleWindowCloseMessage());
+            };
+        }
+
+        public override void Opened()
+        {
+            base.Opened();
+            _window.OpenCentered();
+        }
+
+        public override void Closed()
+        {
+            base.Closed();
+            _window.Close();
+        }
+
+        public override void HandleState(EuiStateBase state)
+        {
+            base.HandleState(state);
+
+            if (state is not GhostRolesEuiState ghostState) return;
+
+            _window.ClearEntries();
+
+            foreach (var info in ghostState.GhostRoles)
+            {
+                _window.AddEntry(info);
+            }
+        }
+    }
+}