feat(statemachine): 🚧 first draft of new xstate based statemachine implementation

Replaces the old statemachine.
Done so far:
- Basic command interface
- Machine saving and loading
- Sample dummy machine

lib/index.js

@@ -104,7 +104,7 @@ bot.once("spawn", () => {
         mover: require('./plugins/mover'),
         guard: require('./plugins/guard'),
         // miner: require('./plugins/miner.js'),
-        // statemachine: require('./plugins/statemachine'),
+        statemachine: require('./plugins/statemachine'),
     }
 
     cfg.plugins = plugins