add basic translation interface and default translator

src/Prime/Translation/EchoTranslator.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the PHPFlasher package.
+ * (c) Younes KHOUBZA <younes.khoubza@gmail.com>
+ */
+
+namespace Flasher\Prime\Translation;
+
+final class EchoTranslator implements TranslatorInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function translate($id, $locale = null)
+    {
+        return $id;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return 'en';
+    }
+}

src/Prime/Translation/TranslatorInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of the PHPFlasher package.
+ * (c) Younes KHOUBZA <younes.khoubza@gmail.com>
+ */
+
+namespace Flasher\Prime\Translation;
+
+interface TranslatorInterface
+{
+    /**
+     * @param string      $id
+     * @param string|null $locale
+     *
+     * @return string
+     */
+    public function translate($id, $locale = null);
+
+    /**
+     * @return string
+     */
+    public function getLocale();
+}