Lagom: Move this into Meta/

This is more of a meta thing, since it's not seeing active development,
but is just a way for me to build some Serenity parts and include them
in other projects. Move it out of the root to keep things tidy.

Meta/Lagom/TestApp.cpp

@@ -0,0 +1,15 @@
+#include <LibCore/CEventLoop.h>
+#include <LibCore/CTimer.h>
+#include <stdio.h>
+
+int main(int, char**)
+{
+    CEventLoop event_loop;
+
+    auto timer = CTimer::construct(100, [&] {
+        dbg() << "Timer fired, good-bye! :^)";
+        event_loop.quit(0);
+    });
+
+    return event_loop.exec();
+}