Update all packaging manifests to v5.3.6, add Scoop + Docker

- AUR PKGBUILD: v5.3.6, new asset URLs, verified SHA256
- Chocolatey: v5.3.6 nuspec + install script with new zip URL/hash
- Winget: v5.3.6 multi-file manifest format
- Nix: v5.3.6 derivation with updated fetchurl hashes
- RPM: v5.3.6 spec + build script with new binary names
- Debian: v5.3.6 control + build script
- AppImage: v5.3.6 build script with new download URL
- Scoop: new bucket manifest (JSON) for Windows
- Docker: new Dockerfile + docker-compose for headless node

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packaging/appimage/build-appimage.sh

@@ -3,7 +3,7 @@
 # Run on a Linux x64 system with appimagetool installed
 set -e
 
-VERSION="5.1.5"
+VERSION="5.3.6"
 APPDIR="Triangles-x86_64.AppDir"
 RELEASE_URL="https://github.com/SamiAhmed7777/triangles_v5/releases/download/v${VERSION}"
 
@@ -17,7 +17,7 @@ mkdir -p "$APPDIR/usr/share/icons/hicolor/256x256/apps"
 
 # Download binary
 echo "Downloading triangles-qt..."
-curl -L -o "$APPDIR/usr/bin/triangles-qt" "${RELEASE_URL}/triangles-qt-linux"
+curl -L -o "$APPDIR/usr/bin/triangles-qt" "${RELEASE_URL}/Cryptographic-Triangles-v${VERSION}-linux-x64-qt"
 chmod +x "$APPDIR/usr/bin/triangles-qt"
 
 # Create desktop entry