feat: add standard file headers to all 57 files missing them

- Add Copyright + FILE INFORMATION headers to 11 PHP enterprise classes
- Add FILE INFORMATION blocks to 9 PHP files with incomplete headers
- Add headers to 2 test files
- Add markdown comment headers to 27 index/README files
- Add headers to 5 root markdown files
- Add FILE INFORMATION to 4 files with existing but incomplete headers

All files now conform to moko-platform file header standard.

Authored-by: Moko Consulting

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/functions.php

@@ -1,13 +1,20 @@
 <?php
 /**
  * MokoStandards Common Functions
- * 
+ *
  * Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
- * 
+ *
  * SPDX-License-Identifier: GPL-3.0-or-later
- * 
+ *
+ * FILE INFORMATION
+ * DEFGROUP: MokoStandards.Common
+ * INGROUP: MokoStandards
+ * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
+ * PATH: /src/functions.php
+ * BRIEF: Common utility functions
+ *
  * This file provides global helper functions for MokoStandards.
- * 
+ *
  * @package MokoStandards
  * @version 04.00.04
  */