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/launch_player.bat

@@ -0,0 +1,27 @@
+@echo off
+REM ============================================================
+REM Kiwy Signage Player - Windows Launcher
+REM ============================================================
+REM This batch file launches the Kiwy Signage Player executable.
+REM It creates local folders for playlist, media, config, and logs
+REM next to the executable.
+REM ============================================================
+
+cd /d "%~dp0dist\KiwySignagePlayer"
+
+echo ============================================
+echo  Kiwy Signage Player - Windows Edition
+echo ============================================
+echo.
+echo Launching player...
+echo.
+
+start "" "KiwySignagePlayer.exe"
+
+echo Player started.
+echo.
+echo If the player window does not appear, check:
+echo   dist\KiwySignagePlayer\logs\crash.log
+echo   dist\KiwySignagePlayer\logs\fatal_crash.log
+echo.
+pause