Initial project structure

Signed-off-by: Severin Kaderli <severin@kaderli.dev>

hello_world/main.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+
+int main(int argc, char* argv[])
+{
+    std::cout << "Hello, World!" << std::endl;
+    return 0;
+}