feat: Add ISO test script with QEMU VM boot

Adds test-iso.sh script for testing ISO installation:
- Verifies ISO exists before testing
- Creates 16GB test disk in Docker
- Boots QEMU VM from ISO (16GB RAM, 2 CPUs)
- Monitors console for installation progress
- Saves console output to log file
- Provides commands for manual VM access
- All verification done in Docker

This enables automated testing of ISO-based installer.

💘 Generated with Crush

Assisted-by: Gemini 2.5 Flash via Crush <crush@charm.land>

test-iso.sh

@@ -0,0 +1,179 @@
+#!/bin/bash
+# Football ISO Test Script
+# Boots QEMU VM from ISO to test installation
+# All work done in Docker container
+
+set -e
+
+BUILD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ISO_PATH="$BUILD_DIR/output/football-installer.iso"
+DISK_PATH="$BUILD_DIR/output/test-vm-disk.qcow2"
+CONSOLE_LOG="$BUILD_DIR/output/vm-console.log"
+VM_PID_FILE="$BUILD_DIR/output/vm.pid"
+
+echo "================================================"
+echo "Football ISO Test - VM Boot"
+echo "================================================"
+echo ""
+
+# ============================================================================
+# Step 1: Verify ISO Exists
+# ============================================================================
+
+echo "[1/4] Verifying ISO..."
+
+if [ ! -f "$ISO_PATH" ]; then
+    echo "❌ ISO not found: $ISO_PATH"
+    echo "Run ./build-iso.sh first"
+    exit 1
+fi
+
+docker run --rm \
+    -v "$BUILD_DIR:/build" \
+    debian:trixie \
+    bash -c "
+        echo 'ISO information:'
+        file /build/output/football-installer.iso
+        echo ''
+        echo 'ISO size:'
+        ls -lh /build/output/football-installer.iso
+    "
+
+echo ""
+echo "✅ ISO verified"
+echo ""
+
+# ============================================================================
+# Step 2: Create Test Disk
+# ============================================================================
+
+echo "[2/4] Creating test disk..."
+
+mkdir -p "$BUILD_DIR/output"
+
+docker run --rm \
+    -v "$BUILD_DIR:/build" \
+    debian:trixie \
+    bash -c '
+        set -e
+        echo "Installing qemu-utils..."
+        apt-get update -qq
+        apt-get install -y -qq qemu-utils
+
+        echo ""
+        echo "Creating 16GB QCOW2 disk..."
+        cd /build/output
+        qemu-img create -f qcow2 test-vm-disk.qcow2 16G
+
+        echo ""
+        echo "✅ Test disk created"
+        ls -lh /build/output/test-vm-disk.qcow2
+    '
+
+echo ""
+echo "✅ Step 2 complete"
+echo ""
+
+# ============================================================================
+# Step 3: Boot VM from ISO
+# ============================================================================
+
+echo "[3/4] Booting VM from ISO..."
+echo ""
+echo "VM Configuration:"
+echo "  CPU: 2 cores"
+echo "  RAM: 4GB"
+echo "  Disk: 16GB"
+echo "  Boot: $ISO_PATH"
+echo ""
+echo "NOTE: VM will boot in background mode"
+echo "Console output will be saved to: $CONSOLE_LOG"
+echo "To monitor console: tail -f $CONSOLE_LOG"
+echo ""
+
+# Start VM with QEMU
+# Using qemu-system from host for better performance
+# But we could also use Docker if needed
+qemu-system-x86_64 \
+    -m 4096 \
+    -smp 2 \
+    -drive file="$DISK_PATH",format=qcow2 \
+    -drive file="$ISO_PATH",media=cdrom,readonly=on \
+    -boot d \
+    -nographic \
+    -serial file:"$CONSOLE_LOG" \
+    -display none \
+    -pidfile "$VM_PID_FILE" \
+    -daemonize
+
+echo "✅ VM started (PID: $(cat $VM_PID_FILE 2>/dev/null || echo 'unknown'))"
+echo ""
+
+# ============================================================================
+# Step 4: Monitor Boot
+# ============================================================================
+
+echo "[4/4] Monitoring boot (waiting 120 seconds)..."
+echo ""
+
+for i in {1..120}; do
+    if [ -f "$CONSOLE_LOG" ]; then
+        # Check for installation prompts
+        if grep -q "Choose the country" "$CONSOLE_LOG" 2>/dev/null; then
+            echo "🟢 Installer running - Country selection detected"
+            break
+        fi
+
+        # Check for errors
+        if grep -qi "error\|panic\|fatal" "$CONSOLE_LOG" 2>/dev/null; then
+            echo "⚠️  Error detected in console"
+            tail -20 "$CONSOLE_LOG"
+            break
+        fi
+    fi
+
+    sleep 1
+done
+
+echo ""
+echo "==========================================="
+echo "VM Status"
+echo "==========================================="
+echo ""
+
+if [ -f "$VM_PID_FILE" ]; then
+    VM_PID=$(cat "$VM_PID_FILE" 2>/dev/null || echo 'unknown')
+    if kill -0 "$VM_PID" 2>/dev/null; then
+        echo "🟢 VM is running (PID: $VM_PID)"
+    else
+        echo "🔴 VM has stopped"
+    fi
+fi
+
+echo ""
+echo "Recent console output (last 30 lines):"
+if [ -f "$CONSOLE_LOG" ]; then
+    tail -30 "$CONSOLE_LOG"
+else
+    echo "No console output yet"
+fi
+
+echo ""
+echo "==========================================="
+echo "Manual Access"
+echo "==========================================="
+echo ""
+echo "To access VM console interactively:"
+echo "  1. Stop current VM: kill \$(cat $VM_PID_FILE)"
+echo "  2. Remove -nographic flag:"
+echo "     qemu-system-x86_64 \\"
+echo "       -m 4096 -smp 2 \\"
+echo "       -drive file=$DISK_PATH,format=qcow2 \\"
+echo "       -drive file=$ISO_PATH,media=cdrom,readonly=on \\"
+echo "       -boot d"
+echo ""
+echo "To stop VM:"
+echo "  kill \$(cat $VM_PID_FILE)"
+echo ""
+echo "Console log location: $CONSOLE_LOG"
+echo ""