feat: add world voxel snapshot forwarding

Collect chunk voxel data from the bot world and stream snapshot,
chunk, and unwatch messages through the forward protocol.

bot/instance/bot_instance_init.ts

@@ -165,9 +165,9 @@ export class BotContext implements bot_instance_context<any> {
         this.plugin_manager = new PluginManager(this);
     }
 
-    public log(log: log[]) {
-        this.logger.log(log);
-        this.emit('log', log);
+    public log(log: log[]) {
+        this.logger.log(log);
+        this.notify('log', log);
     }
 
     public create_instance(): Promise<bot_operation_code> {