add connection manager and facade with implementation

src/Facades/MQTT.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMqtt\Client\Facades;
+
+use Illuminate\Support\Facades\Facade;
+use PhpMqtt\Client\ConnectionManager;
+use PhpMqtt\Client\MQTTClient;
+
+/**
+ * @method static MQTTClient connection(string $name = null)
+ * @method static void close(string $connection = null)
+ * @method static void publish(string $topic, string $message, string $connection = null)
+ *
+ * @see ConnectionManager
+ * @package PhpMqtt\Client\Facades
+ */
+class MQTT extends Facade
+{
+    /**
+     * Get the registered name of the component.
+     *
+     * @return string
+     */
+    protected static function getFacadeAccessor()
+    {
+        return ConnectionManager::class;
+    }
+}