Added missing help command

This commit adds the missing help command for the bot.

src/Bot/Commands/Help.php

@@ -0,0 +1,41 @@
+<?php 
+
+namespace nogueiracodes\RaspberryBot\Bot\Commands;
+
+use Exception;
+use nogueiracodes\RaspberryBot\Core\Interfaces\Command;
+use nogueiracodes\RaspberryBot\Traits\HasSignature;
+use Zttp\Zttp;
+
+class Help implements Command
+{
+    use HasSignature;
+
+
+    public $signature = "help {section: The section to retrieve help for}";
+
+
+    public function run(array $parameters)
+    {
+
+       switch($parameters['section'])
+       {
+       		case "commands":
+
+				if(file_exists(PROJECT_ROOT . "/Commandfiles/help.txt"))
+				{
+					return str_replace("<prefix>", $_ENV['COMMAND_PREFIX'], file_get_contents(PROJECT_ROOT . "/Commandfiles/help.txt"));
+				}
+				else
+				{
+					return ":x: There is currently no available help.";
+				}
+
+       		break;
+
+       		default:
+				return ":x: There is no help section named " . $parameters['section'] . ".";
+       		break;
+       }
+    }
+}

src/Bot/init.php

@@ -8,3 +8,4 @@ $dotenv->load();
 $dotenv->required('BOT_AUTH_TOKEN')->notEmpty();
 $dotenv->required('COMMAND_PREFIX')->notEmpty();
 
+define('PROJECT_ROOT', realpath(__DIR__ . '/../../'));