Enhance README with logo and badges; update documentation; modify read_only to False (#32)

src/excel_mcp/data.py

@@ -21,7 +21,7 @@ def read_excel_range(
 ) -> list[dict[str, Any]]:
     """Read data from Excel range with optional preview mode"""
     try:
-        wb = load_workbook(filepath, read_only=True)
+        wb = load_workbook(filepath, read_only=False)
         
         if sheet_name not in wb.sheetnames:
             raise DataError(f"Sheet '{sheet_name}' not found")

src/excel_mcp/workbook.py

@@ -67,7 +67,7 @@ def get_workbook_info(filepath: str, include_ranges: bool = False) -> dict[str,
         if not path.exists():
             raise WorkbookError(f"File not found: {filepath}")
             
-        wb = load_workbook(filepath, read_only=True)
+        wb = load_workbook(filepath, read_only=False)
         
         info = {
             "filename": path.name,