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>

Makefile

@@ -0,0 +1,35 @@
+# Das OS build entry points. Everything except QEMU runs in the Void builder container.
+
+.PHONY: help packages iso qemu qemu-bios qemu-disk test clean
+
+help:
+	@echo "make packages   build srcpkgs/* into the local repository (out/hostdir/binpkgs)"
+	@echo "make iso        build packages, then the live ISO (out/iso)"
+	@echo "make qemu       boot the newest ISO in QEMU with UEFI"
+	@echo "make qemu-bios  boot the newest ISO in QEMU with legacy BIOS"
+	@echo "make qemu-disk  boot with a 20 GB virtual disk attached (for installer tests)"
+	@echo "make test       run Go tests"
+	@echo "make clean      remove build output (keeps download caches)"
+
+packages:
+	scripts/builder.sh /work/scripts/container/build-packages.sh
+
+iso: packages
+	scripts/builder.sh /work/scripts/container/build-iso.sh
+
+qemu:
+	scripts/run-qemu.sh
+
+qemu-bios:
+	scripts/run-qemu.sh --bios
+
+qemu-disk:
+	scripts/run-qemu.sh --disk
+
+test:
+	cd srcpkgs/das-theme/files/xfwm4gen && go test ./...
+
+# Build output may be owned by root when a build was interrupted, so remove it from the container
+clean:
+	scripts/builder.sh rm -rf /work/out/hostdir/binpkgs /work/out/iso
+	rm -rf out/qemu