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, 13 insertions, 0 deletions

diff --git a/packages/kernel/tests/test_kernel.cpp b/packages/kernel/tests/test_kernel.cpp
new file mode 100644
index 0000000..ebcfbc3
--- /dev/null
+++ b/packages/kernel/tests/test_kernel.cpp
@@ -0,0 +1,13 @@
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include <doctest/doctest.h>
+
+#include <unbox/kernel/kernel.hpp>
+
+TEST_CASE("kernel compiles against and links wlroots + libwayland-server") {
+    CHECK(unbox::kernel::link_probe());
+    CHECK(unbox::kernel::wlroots_version().substr(0, 4) == "0.20");
+}
+
+TEST_CASE("vendored RMLUi subproject compiled and linked") {
+    CHECK(!unbox::kernel::rmlui_version().empty());
+}