Add cleanup script for build artifacts

cleanup.bat

@@ -0,0 +1,60 @@
+@echo off
+:: Dolibarr MCP - Clean Build Artifacts
+:: Run this before setup if you have installation issues
+
+echo.
+echo Cleaning Dolibarr MCP build artifacts...
+echo ========================================
+echo.
+
+:: Remove all egg-info directories
+echo Removing egg-info directories...
+for /d %%i in (*.egg-info) do (
+    echo   - Removing %%i
+    rmdir /s /q "%%i" 2>nul
+)
+for /d %%i in (src\*.egg-info) do (
+    echo   - Removing %%i
+    rmdir /s /q "%%i" 2>nul
+)
+for /d %%i in (src\dolibarr_mcp.egg-info) do (
+    echo   - Removing %%i
+    rmdir /s /q "%%i" 2>nul
+)
+
+:: Remove build directories
+if exist build (
+    echo Removing build directory...
+    rmdir /s /q build
+)
+
+if exist dist (
+    echo Removing dist directory...
+    rmdir /s /q dist
+)
+
+:: Remove Python cache
+echo Removing Python cache...
+for /d /r %%i in (__pycache__) do (
+    if exist "%%i" (
+        echo   - Removing %%i
+        rmdir /s /q "%%i" 2>nul
+    )
+)
+
+:: Remove .pyc and .pyo files
+echo Removing compiled Python files...
+del /s /q *.pyc 2>nul
+del /s /q *.pyo 2>nul
+
+:: Remove virtual environment
+if exist venv_dolibarr (
+    echo Removing virtual environment...
+    rmdir /s /q venv_dolibarr
+)
+
+echo.
+echo Cleanup complete!
+echo You can now run setup.bat for a fresh installation.
+echo.
+pause