Add IDE autocomplete hints (#253)

config/__autocomplete.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * This class only exists here for IDE (PHPStorm/Netbeans/...) autocompletion.
+ * This file is never included anywhere.
+ * Adjust this file to match classes configured in your application config, to enable IDE autocompletion for custom components.
+ * Example: A property phpdoc can be added in `__Application` class as `@property \vendor\package\Rollbar|__Rollbar $rollbar` and adding a class in this file
+ * ```php
+ * // @property of \vendor\package\Rollbar goes here
+ * class __Rollbar {
+ * }
+ * ```
+ */
+class Yii {
+    /**
+     * @var \yii\web\Application|\yii\console\Application|__Application
+     */
+    public static $app;
+}
+
+/**
+ * @property yii\rbac\DbManager $authManager 
+ * @property \yii\web\User|__WebUser $user
+ * 
+ */
+class __Application {
+}
+
+/**
+ * @property app\models\User $identity
+ */
+class __WebUser {
+}