Redo backend installer logic to support BIOS/MBR boot on older devices and switch to GRUB2

run_vm_bios.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Configuration
+ISO_PATH="${1:-/home/n0va/.local/share/iridium-installer-vm/Fedora.iso}"
+DISK_PATH="${2:-/home/n0va/.local/share/iridium-installer-vm/test-disk.qcow2}"
+
+echo "Starting Iridium VM with BIOS (Legacy) support..."
+echo "ISO: $ISO_PATH"
+echo "Disk: $DISK_PATH"
+
+# QEMU Command with BIOS (Standard QEMU behavior)
+qemu-system-x86_64 
+    -enable-kvm 
+    -m 8G 
+    -smp 2 
+    -cpu host 
+    -drive file="$DISK_PATH",format=qcow2,if=virtio 
+    -cdrom "$ISO_PATH" 
+    -boot once=d 
+    -netdev user,id=net0 
+    -device virtio-net-pci,netdev=net0 
+    -vga virtio 
+    -display gtk,gl=on 
+    -monitor unix:$HOME/.local/share/iridium-installer-vm/monitor.sock,server,nowait 
+    -name "Iridium Installer Test VM (BIOS)"