Added testing

Preparing profiles and dependencies, but added testing to separate them from regular targets and avoid the need for a 'testing' profile which could negatively impact configuration size and readability.

examples/testing/chinookfile

@@ -0,0 +1,9 @@
+name: testing
+gpid: examples
+semv: 1.0.0
+
+tests:
+- name: factorial_test
+  type: program
+  srcs:
+  - ./entry.cpp

examples/testing/entry.cpp

@@ -0,0 +1,13 @@
+int factorial(int start) {
+  if (start < 0)
+    return 0;
+
+  auto result = 1;
+  for (auto index = 2; index < start; index++)
+    result *= index;
+  return result;
+}
+
+int main(int argc, char** argv) {
+  return factorial(5) == 120;
+}