added user-specific rates (#1455)

src/Entity/RateInterface.php

@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Entity;
+
+interface RateInterface
+{
+    public function getUser(): ?User;
+
+    public function getRate(): float;
+
+    public function isFixed(): bool;
+
+    public function getScore(): int;
+}