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/builder.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Runs a command inside the Void Linux builder container.
+# The project is mounted at /work; downloaded packages are cached in out/cache/xbps.
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")/.." && pwd)
+image=dasos-builder
+
+docker build --quiet --tag "$image" "$root/docker/builder" >/dev/null
+mkdir -p "$root/out/cache/xbps"
+
+# --privileged: mklive mounts /proc, /sys, /dev and a loop device for the root image
+exec docker run --rm --privileged \
+  --volume "$root:/work" \
+  --volume "$root/out/cache/xbps:/var/cache/xbps" \
+  --env HOST_UID="$(id -u)" \
+  --env HOST_GID="$(id -g)" \
+  "$image" "$@"