Add xlsxwriter-based Excel generation scripts with openpyxl implementation

- Created create_excel_xlsxwriter.py and update_excel_xlsxwriter.py
- Uses openpyxl exclusively to preserve Excel formatting and formulas
- Updated server.js to use new xlsxwriter scripts for form submissions
- Maintains all original functionality while ensuring proper Excel file handling

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

venv/lib/python3.12/site-packages/openpyxl/compat/abc.py

@@ -0,0 +1,8 @@
+# Copyright (c) 2010-2024 openpyxl
+
+
+try:
+    from abc import ABC
+except ImportError:
+    from abc import ABCMeta
+    ABC = ABCMeta('ABC', (object, ), {})