feat: add getter for cached oauth options (#10029)

program/include/rcmail_oauth.php

@@ -362,6 +362,16 @@ class rcmail_oauth
         return $this->last_error;
     }
 
+    /**
+     * Getter for OAuth options
+     *
+     * @return array OAuth configuration options
+     */
+    public function get_options()
+    {
+        return $this->options;
+    }
+
     /**
      * Callback for `loginform_content` hook
      *