Fix total users chat command, add help command

assets/robocraft/chat.json

@@ -1,18 +0,0 @@
-{
-    "commands": [
-        {
-            "regex": "\\?online",
-            "op": {
-                "type": "BuiltIn",
-                "built_in": "OnlineUsers"
-            }
-        },
-        {
-            "regex": "\\?users",
-            "op": {
-                "type": "BuiltIn",
-                "built_in": "TotalUsers"
-            }
-        }
-    ]
-}

assets/robocraft/config.json

@@ -14462,6 +14462,13 @@
                     "type": "BuiltIn",
                     "built_in": "TotalUsers"
                 }
+            },
+            {
+                "regex": "\\?help",
+                "op": {
+                    "type": "BuiltIn",
+                    "built_in": "Help"
+                }
             }
         ]
     },
@@ -14539,4 +14546,4 @@
             }
         ]
     }
-}
+}