Add make ghost role verb (#3204)

Content.Shared/GameObjects/Components/Observer/GhostRoles/GhostRolesEuiMessages.cs

@@ -0,0 +1,41 @@
+using System;
+using Content.Shared.Eui;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Observer.GhostRoles
+{
+    [NetSerializable, Serializable]
+    public struct GhostRoleInfo
+    {
+        public uint Identifier { get; set; }
+        public string Name { get; set; }
+        public string Description { get; set; }
+    }
+
+    [NetSerializable, Serializable]
+    public class GhostRolesEuiState : EuiStateBase
+    {
+        public GhostRoleInfo[] GhostRoles { get; }
+
+        public GhostRolesEuiState(GhostRoleInfo[] ghostRoles)
+        {
+            GhostRoles = ghostRoles;
+        }
+    }
+
+    [NetSerializable, Serializable]
+    public class GhostRoleTakeoverRequestMessage : EuiMessageBase
+    {
+        public uint Identifier { get; }
+
+        public GhostRoleTakeoverRequestMessage(uint identifier)
+        {
+            Identifier = identifier;
+        }
+    }
+
+    [NetSerializable, Serializable]
+    public class GhostRoleWindowCloseMessage : EuiMessageBase
+    {
+    }
+}