Slice 1: Meson skeleton — kernel links wlroots 0.20 from C++, RMLUi 6.2 vendored

Root meson.build (C++23, WLR_USE_UNSTABLE, ccache-detected) with RMLUi 6.2
as a wrap-file tarball built through the cmake module (no git submodules —
settled decision) and doctest 2.5.2 from wrapdb. kernel unit: extern-"C"
wlr.hpp wrapper (with the C99 [static N] array-param workaround documented
in kernel.md), slice-1 probe contract, doctest suite (1/1 green). host-bin:
composition root printing versions, exit 0. tasks.md slice 1 done.

1 files changed, 14 insertions, 0 deletions

diff --git a/packages/host-bin/src/main.cpp b/packages/host-bin/src/main.cpp
new file mode 100644
index 0000000..713186d
--- /dev/null
+++ b/packages/host-bin/src/main.cpp
@@ -0,0 +1,14 @@
+#include <unbox/kernel/kernel.hpp>
+
+#include <cstdio>
+
+auto main() -> int {
+    const bool probe_ok = unbox::kernel::link_probe();
+
+    std::printf("unbox 0.0.1 — kernel skeleton (slice 1)\n");
+    std::printf("  wlroots    %s\n", unbox::kernel::wlroots_version().c_str());
+    std::printf("  RmlUi      %s\n", unbox::kernel::rmlui_version().c_str());
+    std::printf("  link probe %s\n", probe_ok ? "ok" : "FAILED");
+
+    return probe_ok ? 0 : 1;
+}