chore: create and add plugin template

created with help by these Websites:
[Delicious Brains](https://deliciousbrains.com/wordpress-plugin-development-template-files/)
[Wordpress Plugin Boilerplate generator](https://wppb.me/)

rk-wichteln/includes/class-rk-wichteln-i18n.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * Define the internationalization functionality
+ *
+ * Loads and defines the internationalization files for this plugin
+ * so that it is ready for translation.
+ *
+ * @link       https://wpdev.rainer-kehnen.de
+ * @since      1.0.0
+ *
+ * @package    Rk_Wichteln
+ * @subpackage Rk_Wichteln/includes
+ */
+
+/**
+ * Define the internationalization functionality.
+ *
+ * Loads and defines the internationalization files for this plugin
+ * so that it is ready for translation.
+ *
+ * @since      1.0.0
+ * @package    Rk_Wichteln
+ * @subpackage Rk_Wichteln/includes
+ * @author     Rainer Kehnen <wpdev.plugin@rainer-kehnen.de>
+ */
+class Rk_Wichteln_i18n {
+
+
+	/**
+	 * Load the plugin text domain for translation.
+	 *
+	 * @since    1.0.0
+	 */
+	public function load_plugin_textdomain() {
+
+		load_plugin_textdomain(
+			'rk-wichteln',
+			false,
+			dirname( dirname( plugin_basename( __FILE__ ) ) ) . '/languages/'
+		);
+
+	}
+
+
+
+}