Introduce class IcingadbUtils

This singleton class includes all required icingadb trailts

library/Graphite/Util/IcingadbUtils.php

@@ -0,0 +1,49 @@
+<?php
+
+/* Icinga Graphite Web | (c) 2022 Icinga GmbH | GPLv2 */
+
+namespace Icinga\Module\Graphite\Util;
+
+use Icinga\Module\Icingadb\Common\Auth;
+use Icinga\Module\Icingadb\Common\Database;
+use Icinga\Module\Icingadb\Common\Macros;
+
+/**
+* Class for initialising icingadb utils
+ */
+class IcingadbUtils
+{
+    use Macros;
+    use Database;
+    use Auth;
+
+    protected static $instance;
+
+    /**
+     * @see getInstance()
+     */
+    private function __construct()
+    {
+    }
+
+    /**
+     * Get the IcingadbUtils instance
+     *
+     * @return IcingadbUtils
+     */
+    public static function getInstance(): IcingadbUtils
+    {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+
+        return static::$instance;
+    }
+
+    /**
+     * Prevent the instance from being cloned (which would create a second instance of it)
+     */
+    private function __clone()
+    {
+    }
+}