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

scripts/curated-snippets/glm.cpp

@@ -0,0 +1,8 @@
+#include <glm/glm.hpp>
+import std;
+
+int main() {
+    glm::vec3 v(1.0f, 2.0f, 3.0f);
+    std::println("glm ok: ({},{},{})", v.x, v.y, v.z);
+    return 0;
+}