Stage 4: Calamares installer and Btrfs snapshots (0.2.0)

- Package Calamares 3.4.3 (Qt6, widgets UI) with xbps-src.
- das-installer: Calamares setup for Void/runit with Das OS branding and
  slides. It copies the clean live image (live-base), builds locales and the
  host-only initramfs, rewrites kernels without sparse tails (GRUB 2.12 cannot
  read Btrfs holes at the end of a file), then removes itself.
- das-snapshots: flat Btrfs layout (@, @home, @snapshots, @var_log,
  @var_cache_xbps), snapper with hourly snapshots via cronie, grub-btrfs menu,
  snapper-rollback, and a dracut module that boots read-only snapshots with
  a RAM overlay.
- das-settings 0.2.0: start LightDM with the system locale.
- Live image: GRUB, efibootmgr and the new packages; Das OS /etc/issue.
- Build: wipe stale destdirs before building packages.

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

srcpkgs/calamares/template

@@ -0,0 +1,22 @@
+# Template file for 'calamares'
+pkgname=calamares
+version=3.4.3
+revision=2
+build_style=cmake
+configure_args="-DWITH_QT6=ON -DWITH_QML=OFF -DWITH_PYTHON=ON -DWITH_PYBIND11=ON
+ -DINSTALL_CONFIG=OFF -DBUILD_TESTING=OFF -DBUILD_SCHEMA_TESTING=OFF
+ -DBUILD_CRASH_REPORTING=OFF -DCMAKE_INSTALL_LIBEXECDIR=libexec
+ -DUSE_services=none
+ -DSKIP_MODULES=dummycpp;dummyprocess;dummypython;initcpio;initcpiocfg;mkinitfs;openrcdmcryptcfg;plasmalnf;plymouthcfg;tracking;zfs;zfshostid;interactiveterminal"
+hostmakedepends="extra-cmake-modules gettext pkg-config python3 qt6-base qt6-tools"
+makedepends="icu-devel kf6-kcoreaddons-devel kpmcore-devel libparted-devel
+ libpwquality-devel libxcrypt-devel polkit-qt6-devel python3-devel qt6-base-devel
+ qt6-svg-devel qt6-tools-devel yaml-cpp-devel"
+depends="ckbcomp kpmcore polkit python3 qt6-plugin-tls-openssl qt6-svg rsync
+ squashfs-tools xkeyboard-config"
+short_desc="Distribution-independent installer framework"
+maintainer="Das <anry.das@gmail.com>"
+license="GPL-3.0-or-later"
+homepage="https://calamares.codeberg.page"
+distfiles="https://codeberg.org/Calamares/calamares/releases/download/v${version}/calamares-${version}.tar.gz"
+checksum=144cbbf6bdcebfb21685950db4f0777218519df095f62f4aa392f28348110d18