Add Windows installer packaging (Setup.exe + portable exe)

PyInstaller onedir/onefile specs, Inno Setup script, and GitHub Actions
workflow to produce JUC500-Setup-win64.exe and portable builds.

Co-authored-by: Cursor <cursoragent@cursor.com>

build-installer-windows.bat

@@ -0,0 +1,103 @@
+@echo off
+REM JUC500 Windows 설치파일 + 포터블 빌드 (Windows x64에서 실행)
+REM 결과:
+REM   dist\JUC500\JUC500.exe
+REM   dist\JUC500-portable.exe
+REM   dist-windows\JUC500-Setup-win64.exe
+REM   dist-windows\JUC500-win64-portable.zip
+REM   dist-windows\JUC500-portable.exe
+setlocal EnableExtensions EnableDelayedExpansion
+cd /d "%~dp0"
+
+echo ============================================
+echo  JUC500 — Windows Installer / Portable
+echo ============================================
+echo.
+
+set "PY="
+if defined PYTHON set "PY=%PYTHON%"
+if not defined PY (
+  where py >nul 2>&1 && set "PY=py -3.11"
+)
+if not defined PY set "PY=python"
+
+echo ==^> Python: %PY%
+%PY% -c "import sys; assert sys.version_info>=(3,10); assert sys.maxsize>2**32; print(sys.version)" || (
+  echo 64-bit Python 3.10+ 가 필요합니다.
+  exit /b 1
+)
+
+if not exist "vendor\libusb-1.0.dll" (
+  echo [!] vendor\libusb-1.0.dll 없음 — USB 동작에 필요합니다.
+  echo     https://github.com/libusb/libusb/releases 에서 MS64 dll 을 넣으세요.
+  exit /b 1
+)
+
+if not exist ".venv-build-win\Scripts\python.exe" (
+  %PY% -m venv .venv-build-win
+)
+call .venv-build-win\Scripts\activate.bat
+python -m pip install -q -U pip pyinstaller pyusb
+
+echo ==^> PyInstaller onedir
+if exist build\juc500-windows rmdir /s /q build\juc500-windows 2>nul
+if exist build\JUC500 rmdir /s /q build\JUC500 2>nul
+if exist dist\JUC500 rmdir /s /q dist\JUC500
+python -m PyInstaller --noconfirm --clean juc500-windows.spec
+if not exist "dist\JUC500\JUC500.exe" (
+  echo 빌드 실패: dist\JUC500\JUC500.exe 없음
+  exit /b 1
+)
+
+echo ==^> PyInstaller onefile ^(portable exe^)
+python -m PyInstaller --noconfirm --clean juc500-windows-onefile.spec
+if not exist "dist\JUC500-portable.exe" (
+  echo 빌드 실패: dist\JUC500-portable.exe 없음
+  exit /b 1
+)
+
+copy /Y packaging\windows\install.ps1 dist\JUC500\install.ps1 >nul
+copy /Y packaging\windows\setup.bat dist\JUC500\setup.bat >nul
+copy /Y packaging\windows\README-WIN.txt dist\JUC500\README-WIN.txt >nul
+copy /Y packaging\windows\zadig-hint.url dist\JUC500\zadig-hint.url >nul
+copy /Y vendor\libusb-1.0.dll dist\JUC500\libusb-1.0.dll >nul 2>nul
+
+if not exist dist-windows mkdir dist-windows
+
+echo ==^> Portable zip + portable exe
+powershell -NoProfile -Command ^
+  "Compress-Archive -Path 'dist\JUC500\*' -DestinationPath 'dist-windows\JUC500-win64-portable.zip' -Force"
+copy /Y dist\JUC500-portable.exe dist-windows\JUC500-portable.exe >nul
+copy /Y packaging\windows\install.ps1 dist-windows\install.ps1 >nul
+copy /Y packaging\windows\README-WIN.txt dist-windows\README-WIN.txt >nul
+
+REM --- Inno Setup → Setup.exe ---
+set "ISCC="
+if exist "%LocalAppData%\Programs\Inno Setup 6\ISCC.exe" set "ISCC=%LocalAppData%\Programs\Inno Setup 6\ISCC.exe"
+if not defined ISCC if exist "%ProgramFiles(x86)%\Inno Setup 6\ISCC.exe" set "ISCC=%ProgramFiles(x86)%\Inno Setup 6\ISCC.exe"
+if not defined ISCC if exist "%ProgramFiles%\Inno Setup 6\ISCC.exe" set "ISCC=%ProgramFiles%\Inno Setup 6\ISCC.exe"
+
+if defined ISCC (
+  echo ==^> Inno Setup: %ISCC%
+  "%ISCC%" packaging\windows\juc500.iss
+) else (
+  echo.
+  echo [!] Inno Setup 6 이 없어 Setup.exe 를 생략합니다.
+  echo     https://jrsoftware.org/isinfo.php
+  echo     portable zip / JUC500-portable.exe 는 생성되었습니다.
+)
+
+echo.
+echo ============================================
+echo  완료
+echo ============================================
+echo   EXE:         %CD%\dist\JUC500\JUC500.exe
+echo   포터블 EXE:  %CD%\dist-windows\JUC500-portable.exe
+echo   포터블 ZIP:  %CD%\dist-windows\JUC500-win64-portable.zip
+if exist dist-windows\JUC500-Setup-win64.exe (
+  echo   설치파일:    %CD%\dist-windows\JUC500-Setup-win64.exe
+) else (
+  echo   설치파일:    ^(미생성 — Inno Setup 6 필요^)
+)
+echo.
+endlocal