Restarted the production of the app

libs/CLI11/test_package/example.cpp

@@ -0,0 +1,20 @@
+// This file is a "Hello, world!" CLI11 program
+
+#include "CLI/CLI.hpp"
+
+#include <iostream>
+
+int main(int argc, char **argv) {
+
+    CLI::App app("Some nice description");
+
+    int x = 0;
+    app.add_option("-x", x, "an integer value")->capture_default_str();
+
+    bool flag;
+    app.add_flag("-f,--flag", flag, "a flag option");
+
+    CLI11_PARSE(app, argc, argv);
+
+    return 0;
+}