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/drawing/xdr.py

@@ -0,0 +1,33 @@
+# Copyright (c) 2010-2024 openpyxl
+
+"""
+Spreadsheet Drawing has some copies of Drawing ML elements
+"""
+
+from .geometry import Point2D, PositiveSize2D, Transform2D
+
+
+class XDRPoint2D(Point2D):
+
+    namespace = None
+    x = Point2D.x
+    y = Point2D.y
+
+
+class XDRPositiveSize2D(PositiveSize2D):
+
+    namespace = None
+    cx = PositiveSize2D.cx
+    cy = PositiveSize2D.cy
+
+
+class XDRTransform2D(Transform2D):
+
+    namespace = None
+    rot = Transform2D.rot
+    flipH = Transform2D.flipH
+    flipV = Transform2D.flipV
+    off = Transform2D.off
+    ext = Transform2D.ext
+    chOff = Transform2D.chOff
+    chExt = Transform2D.chExt