[8.x] Adding lang_path helper function (#39103)

* adding lang_path to helpers

* Update helpers.php

* Update helpers.php

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: rrpadilla

src/Illuminate/Foundation/helpers.php

@@ -483,6 +483,19 @@ function logger($message = null, array $context = [])
     }
 }
 
+if (! function_exists('lang_path')) {
+    /**
+     * Get the path to the language folder.
+     *
+     * @param  string  $path
+     * @return string
+     */
+    function lang_path($path = '')
+    {
+        return app('path.lang').($path ? DIRECTORY_SEPARATOR.$path : $path);
+    }
+}
+
 if (! function_exists('logs')) {
     /**
      * Get a log driver instance.