Initial commit: add .gitignore and README

generate_excel.bat

@@ -0,0 +1,53 @@
+@echo off
+REM Windows batch script to generate DeFi_Collateral_Simulation.xlsx
+
+REM Check if virtual environment exists
+if not exist "venv" (
+    echo Creating virtual environment...
+    python -m venv venv
+    if errorlevel 1 (
+        echo.
+        echo ERROR: Failed to create virtual environment
+        echo Please install Python first
+        pause
+        exit /b 1
+    )
+)
+
+REM Activate virtual environment
+echo Activating virtual environment...
+call venv\Scripts\activate.bat
+
+REM Install xlsxwriter in virtual environment
+echo Installing xlsxwriter...
+python -m pip install --quiet --upgrade pip
+python -m pip install --quiet xlsxwriter
+
+if errorlevel 1 (
+    echo.
+    echo ERROR: Failed to install xlsxwriter
+    echo Please install Python and pip first
+    call venv\Scripts\deactivate.bat
+    pause
+    exit /b 1
+)
+
+echo.
+echo Generating DeFi_Collateral_Simulation.xlsx...
+python generate_defi_simulation.py
+
+if errorlevel 1 (
+    echo.
+    echo ERROR: Failed to generate workbook
+    call venv\Scripts\deactivate.bat
+    pause
+    exit /b 1
+)
+
+call venv\Scripts\deactivate.bat
+
+echo.
+echo SUCCESS: DeFi_Collateral_Simulation.xlsx has been generated!
+echo.
+pause
+