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/requirements_win.txt

@@ -0,0 +1,28 @@
+# =====================================================================
+# Kiwy Signage Player - Windows Dependencies
+# =====================================================================
+# Install with: pip install -r requirements_win.txt
+
+# --- Core GUI Framework ---
+# Kivy 2.3+ with SDL2 backend (best for Windows)
+kivy[base]>=2.3.0
+
+# --- Video Playback ---
+# ffpyplayer for video decoding
+ffpyplayer>=4.5
+
+# --- HTTP / Networking ---
+requests>=2.32.0,<3.0.0
+aiohttp>=3.9.0,<4.0.0
+certifi>=2024.0.0
+
+# --- Password / Auth ---
+bcrypt>=4.2.0,<5.0.0
+
+# --- Packaging ---
+# PyInstaller for building the .exe
+pyinstaller>=6.0
+
+# --- Optional: DirectShow filters for better video on Windows ---
+# ffmpeg (install via chocolatey or manual download)
+# https://ffmpeg.org/download.html