refactor(eventsub): generate entire files (#5897)

lib/twitch-eventsub-ws/ast/check-clang.hpp

@@ -0,0 +1,12 @@
+// This is a header used for testing if the library can parse a file.
+
+#include <boost/json.hpp>
+#include <QString>
+
+#include <chrono>
+
+boost::json::value doSomething(QString s,
+                               std::chrono::system_clock::time_point tp);
+
+static_assert(sizeof(QString) > sizeof(int));
+static_assert(sizeof(boost::json::value) > sizeof(int));