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, 26 insertions, 0 deletions

diff --git a/packages/kernel/src/kernel.cpp b/packages/kernel/src/kernel.cpp
new file mode 100644
index 0000000..3de39c0
--- /dev/null
+++ b/packages/kernel/src/kernel.cpp
@@ -0,0 +1,26 @@
+#include <unbox/kernel/kernel.hpp>
+#include <unbox/kernel/wlr.hpp>
+
+#include <RmlUi/Core/Core.h>
+
+namespace unbox::kernel {
+
+auto wlroots_version() -> std::string {
+    return WLR_VERSION_STR;
+}
+
+auto rmlui_version() -> std::string {
+    return Rml::GetVersion();
+}
+
+auto link_probe() -> bool {
+    wlr_log_init(WLR_ERROR, nullptr);
+    wl_display* display = wl_display_create();
+    if (display == nullptr) {
+        return false;
+    }
+    wl_display_destroy(display);
+    return true;
+}
+
+} // namespace unbox::kernel