[M5] verify-curated-db.sh + boost recipe (header-only)

scripts/curated-snippets/tbb.cpp

@@ -0,0 +1,9 @@
+#include <oneapi/tbb/parallel_for.h>
+import std;
+
+int main() {
+    int sum = 0;
+    oneapi::tbb::parallel_for(0, 10, [&](int i) { sum += i; });
+    std::println("tbb ok: {}", sum);
+    return 0;
+}