Initial Das OS 0.1.0: Void Linux live ISO with Xfce

- xbps-src templates: das-theme (adw-gtk3-based GTK themes, generated
  xfwm4 frames, wallpapers, logo), das-settings (Xfce, panel, LightDM
  defaults in /etc/xdg/das), adw-gtk3 and font-jetbrains-mono
- void-mklive profile in live/: packages, runit services, rootfs overlay,
  Ukrainian locale, live user with autologin
- Void builder container, build scripts, QEMU runner and Makefile
- Bilingual README with screenshots

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/run-qemu.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+# Boots a Das OS ISO in QEMU (KVM when available).
+#
+# Usage: scripts/run-qemu.sh [--bios] [--disk] [path/to/image.iso]
+#   --bios  boot with legacy BIOS instead of UEFI
+#   --disk  attach out/qemu/disk.qcow2 (20 GB, created on first use) to test installing
+# Without a path the newest ISO in out/iso is used.
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")/.." && pwd)
+state=$root/out/qemu
+firmware=uefi
+disk=false
+iso=""
+
+die() {
+  echo "run-qemu: $*" >&2
+  exit 1
+}
+
+for arg in "$@"; do
+  case $arg in
+    --bios) firmware=bios ;;
+    --disk) disk=true ;;
+    -h | --help)
+      sed -n '2,8s/^# \{0,1\}//p' "$0"
+      exit 0
+      ;;
+    -*) die "unknown option: $arg" ;;
+    *) iso=$arg ;;
+  esac
+done
+
+if [[ -z $iso ]]; then
+  iso=$(ls -t "$root"/out/iso/*.iso 2>/dev/null | head -n 1) || true
+fi
+[[ -n $iso && -f $iso ]] || die "no ISO found, run 'make iso' first"
+
+args=(
+  -machine q35 -smp 4 -m 4096
+  -device virtio-vga -display gtk,zoom-to-fit=on
+  -device virtio-net-pci,netdev=net0 -netdev user,id=net0
+  -device qemu-xhci -device usb-tablet
+  -cdrom "$iso" -boot order=d
+)
+
+if [[ -w /dev/kvm ]]; then
+  args+=(-accel kvm -cpu host)
+else
+  echo "run-qemu: /dev/kvm is not accessible, falling back to slow emulation" >&2
+  args+=(-accel tcg -cpu max)
+fi
+
+mkdir -p "$state"
+
+if [[ $firmware == uefi ]]; then
+  code=""
+  # Debian/Ubuntu/Mint, then Arch, then Fedora file names
+  for candidate in /usr/share/OVMF/OVMF_CODE_4M.fd /usr/share/edk2/x64/OVMF_CODE.4m.fd /usr/share/edk2/ovmf/OVMF_CODE.fd; do
+    [[ -f $candidate ]] && code=$candidate && break
+  done
+  [[ -n $code ]] || die "UEFI firmware (OVMF) not found, install the ovmf package or use --bios"
+  vars_template=$(dirname "$code")/$(basename "$code" | sed 's/CODE/VARS/')
+  [[ -f $state/OVMF_VARS.fd ]] || cp "$vars_template" "$state/OVMF_VARS.fd"
+  args+=(
+    -drive "if=pflash,format=raw,readonly=on,file=$code"
+    -drive "if=pflash,format=raw,file=$state/OVMF_VARS.fd"
+  )
+fi
+
+if [[ $disk == true ]]; then
+  [[ -f $state/disk.qcow2 ]] || qemu-img create -f qcow2 "$state/disk.qcow2" 20G
+  args+=(-drive "file=$state/disk.qcow2,if=virtio,format=qcow2")
+fi
+
+exec qemu-system-x86_64 "${args[@]}"