Add Windows Player support and related files

- New windows/ directory with build scripts, specs, and configuration
- Windows-specific requirements (requirements_win.txt)
- Launch and runtime scripts for Windows (run_win.py, launch_player.bat)
- PyInstaller build configuration (build.spec)
- Updated .gitignore to exclude windows/venv312/
- Updated config and source files for Windows compatibility
- Moved working_files to proper directory

windows/build_win.bat

@@ -0,0 +1,126 @@
+@echo off
+REM =====================================================================
+REM Kiwy Signage Player - Windows Build Script
+REM =====================================================================
+REM This script builds a standalone Windows .exe using PyInstaller.
+REM
+REM Prerequisites:
+REM   1. Python 3.10+ installed (with "Add to PATH" checked)
+REM   2. Visual C++ Redistributable (for ffpyplayer)
+REM   3. FFmpeg binaries in PATH (optional, for video codec support)
+REM
+REM Steps:
+REM   1. Run this script from the project root or the windows\ folder
+REM   2. The .exe will be created in windows\dist\KiwySignagePlayer\
+REM =====================================================================
+
+setlocal enabledelayedexpansion
+
+cd /d "%~dp0"
+
+echo ============================================
+echo  Kiwy Signage Player - Windows Build
+echo ============================================
+echo.
+
+REM ---- Check Python ----
+where python >nul 2>&1
+if %ERRORLEVEL% neq 0 (
+    echo [ERROR] Python not found! Please install Python 3.10+ and add it to PATH.
+    pause
+    exit /b 1
+)
+
+echo [INFO] Using Python:
+python --version
+
+REM ---- Create virtual environment (if not exists) ----
+if not exist "venv\Scripts\python.exe" (
+    echo.
+    echo [STEP] Creating virtual environment...
+    python -m venv venv
+    if %ERRORLEVEL% neq 0 (
+        echo [ERROR] Failed to create virtual environment.
+        pause
+        exit /b 1
+    )
+) else (
+    echo [INFO] Virtual environment already exists.
+)
+
+REM ---- Activate virtual environment ----
+call venv\Scripts\activate.bat
+
+REM ---- Install/upgrade pip ----
+echo.
+echo [STEP] Upgrading pip...
+python -m pip install --upgrade pip
+
+REM ---- Install dependencies ----
+echo.
+echo [STEP] Installing Windows dependencies...
+pip install -r requirements_win.txt
+if %ERRORLEVEL% neq 0 (
+    echo [ERROR] Failed to install dependencies.
+    pause
+    exit /b 1
+)
+
+REM ---- Verify Kivy installation ----
+echo.
+echo [STEP] Verifying Kivy installation...
+python -c "import kivy; print(f'Kivy {kivy.__version__}')" 2>&1
+if %ERRORLEVEL% neq 0 (
+    echo [WARNING] Kivy check failed. Build may still work but test carefully.
+)
+
+REM ---- Check PyInstaller ----
+echo.
+echo [STEP] Verifying PyInstaller...
+python -c "import PyInstaller; print(f'PyInstaller {PyInstaller.__version__}')" 2>&1
+if %ERRORLEVEL% neq 0 (
+    echo [ERROR] PyInstaller not found.
+    pause
+    exit /b 1
+)
+
+REM ---- Create app icon (from PNG if possible) ----
+echo.
+echo [STEP] Checking for app icon...
+if not exist "..\config\resources\app_icon.ico" (
+    echo [INFO] No .ico icon found. Will use default PyInstaller icon.
+    echo [INFO] To add a custom icon, place app_icon.ico in config\resources\
+)
+
+REM ---- Run PyInstaller ----
+echo.
+echo [STEP] Building executable with PyInstaller...
+echo This may take several minutes. Please wait...
+echo.
+
+pyinstaller build.spec --clean --noconfirm
+if %ERRORLEVEL% neq 0 (
+    echo.
+    echo [ERROR] PyInstaller build failed!
+    echo Check the output above for error details.
+    pause
+    exit /b 1
+)
+
+REM ---- Success ----
+echo.
+echo ============================================
+echo  BUILD COMPLETE!
+echo ============================================
+echo.
+echo Output: %~dp0dist\KiwySignagePlayer\
+echo.
+echo The executable is:
+echo   %~dp0dist\KiwySignagePlayer\KiwySignagePlayer.exe
+echo.
+echo To run: Double-click KiwySignagePlayer.exe
+echo.
+echo Note: The first run may take a while as Windows Defender
+echo scans the executable. This is normal.
+echo.
+pause