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/reader/strings.py

@@ -0,0 +1,44 @@
+# Copyright (c) 2010-2024 openpyxl
+
+from openpyxl.cell.text import Text
+
+from openpyxl.xml.functions import iterparse
+from openpyxl.xml.constants import SHEET_MAIN_NS
+from openpyxl.cell.rich_text import CellRichText
+
+
+def read_string_table(xml_source):
+    """Read in all shared strings in the table"""
+
+    strings = []
+    STRING_TAG = '{%s}si' % SHEET_MAIN_NS
+
+    for _, node in iterparse(xml_source):
+        if node.tag == STRING_TAG:
+            text = Text.from_tree(node).content
+            text = text.replace('x005F_', '')
+            node.clear()
+
+            strings.append(text)
+
+    return strings
+
+
+def read_rich_text(xml_source):
+    """Read in all shared strings in the table"""
+
+    strings = []
+    STRING_TAG = '{%s}si' % SHEET_MAIN_NS
+
+    for _, node in iterparse(xml_source):
+        if node.tag == STRING_TAG:
+            text = CellRichText.from_tree(node)
+            if len(text) == 0:
+                text = ''
+            elif len(text) == 1 and isinstance(text[0], str):
+                text = text[0]
+            node.clear()
+
+            strings.append(text)
+
+    return strings