Implement group command + fallback error handling for invalid tables in output

src/vm/commands/index.ts

@@ -52,6 +52,7 @@ import {Call} from "./call.js";
 import {Chunk} from "./chunk.js";
 import {Script} from "./script.js";
 import {Take} from "./take.js";
+import {Group} from "./group.js";
 
 export type Commands = Command<CommandData>[]
 export const commands: Commands = [
@@ -68,6 +69,7 @@ export const commands: Commands = [
     new Enclose,
     new Exit,
     new From,
+    new Group,
     new Help,
     new History,
     new Indent,