Implement basic chat functionality

assets/robocraft/chat.json

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

assets/robocraft/config.json

@@ -14416,6 +14416,13 @@
             ]
         }
     },
+    "chat": {
+        "public_channels": [
+            "main",
+            "sys",
+            "jam_club"
+        ]
+    },
     "settings": {
         "banners": [
             {
@@ -14476,4 +14483,4 @@
             }
         ]
     }
-}
+}