Added missing help command

This commit adds the missing help command for the bot.

bot.php

@@ -1,9 +1,11 @@
+#!/usr/bin/env php
 <?php
 
 use nogueiracodes\RaspberryBot\Bot\Actions\MessageLogger;
 use nogueiracodes\RaspberryBot\Bot\Commands\MinecraftInfo;
 use nogueiracodes\RaspberryBot\Bot\Commands\NumberFact;
 use nogueiracodes\RaspberryBot\Bot\Commands\SimplePlayback;
+use nogueiracodes\RaspberryBot\Bot\Commands\Help;
 use nogueiracodes\RaspberryBot\Core\RaspberryBot;
 
 require 'src/Bot/init.php';
@@ -18,8 +20,9 @@ $raspberryBot
     ->addCommand([
         new SimplePlayback,
         new NumberFact,
-        new MinecraftInfo
+        new MinecraftInfo,
+        new Help
     ])
     ->addAction(new MessageLogger)
     ->setCommandPrefix($_ENV['COMMAND_PREFIX'])
-    ->run();
+    ->run();