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

scripts/curated-snippets/range-v3.cpp

@@ -0,0 +1,12 @@
+#include <range/v3/view/iota.hpp>
+import std;
+
+int main() {
+    auto v = ranges::views::iota(0, 5);
+    int sum = 0;
+    for (int i : v) {
+        sum += i;
+    }
+    std::println("range-v3 ok: {}", sum);
+    return 0;
+}