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/chartsheet/properties.py

@@ -0,0 +1,28 @@
+# Copyright (c) 2010-2024 openpyxl
+
+from openpyxl.descriptors import (
+    Bool,
+    String,
+    Typed
+)
+from openpyxl.descriptors.serialisable import Serialisable
+from openpyxl.styles import Color
+
+
+class ChartsheetProperties(Serialisable):
+    tagname = "sheetPr"
+
+    published = Bool(allow_none=True)
+    codeName = String(allow_none=True)
+    tabColor = Typed(expected_type=Color, allow_none=True)
+
+    __elements__ = ('tabColor',)
+
+    def __init__(self,
+                 published=None,
+                 codeName=None,
+                 tabColor=None,
+                 ):
+        self.published = published
+        self.codeName = codeName
+        self.tabColor = tabColor