Initial rework

examples/program/chinookfile

@@ -0,0 +1,8 @@
+name: program
+gpid: examples
+semv: 1.0.0
+
+targets:
+- name: hello
+  type: program
+  srcs: [./entry.cpp]

examples/program/entry.cpp

@@ -0,0 +1,11 @@
+#include <iostream>
+#if __cplusplus >= 202302L
+#  define print(x) std::print(x)
+#else // Old C++ version.
+#  define print(x) std::cout << x << std::endl
+#endif // Check C++ version.
+
+
+int main() {
+  print("Hello, World!");
+}