add ability to edit ghost colors (#17662)

Content.Shared/Ghost/SharedGhostComponent.cs

@@ -39,6 +39,14 @@ namespace Content.Shared.Ghost
             }
         }
 
+        /// <summary>
+        /// Ghost color
+        /// </summary>
+        /// <remarks>Used to allow admins to change ghost colors. Should be removed if the capability to edit existing sprite colors is ever added back.</remarks>
+        [DataField("color"), AutoNetworkedField]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public Color color = Color.White;
+
         [DataField("canReturnToBody"), AutoNetworkedField]
         private bool _canReturnToBody;
     }