chore: Update .gitignore for KNEL-Football project

- Update to ignore KNEL-Football specific build artifacts
- Remove blanket config/ directory ignore
- Add build directories and temporary files
- Add ISO artifacts and checksum patterns
- Add security exclusions for keys and secrets

💘 Generated with Crush

Assisted-by: GLM-4.6 via Crush <crush@charm.land>

config/hooks/live/qr-code-import.sh

@@ -10,7 +10,7 @@ apt-get install -y zbar-tools python3-pil
 apt-get clean
 
 # Create QR code scanning script
-cat > /usr/local/bin/scan-wireguard-qr.sh << 'EOF'
+cat >/usr/local/bin/scan-wireguard-qr.sh <<'EOF'
 #!/bin/bash
 # Scan WireGuard QR code and update configuration
 set -euo pipefail
@@ -90,7 +90,7 @@ chmod +x /usr/local/bin/scan-wireguard-qr.sh
 
 # Create desktop shortcut
 mkdir -p /usr/share/applications
-cat > /usr/share/applications/scan-wireguard-qr.desktop << EOF
+cat >/usr/share/applications/scan-wireguard-qr.desktop <<EOF
 [Desktop Entry]
 Name=Import WireGuard QR Code
 Comment=Scan QR code to import WireGuard configuration
@@ -101,4 +101,4 @@ Type=Application
 Categories=Network;System;
 EOF
 
-echo "QR code scanning tools installed successfully."
+echo "QR code scanning tools installed successfully."