Add 'trivionomicon/' from commit 'bf39923f9c'

git-subtree-dir: trivionomicon
git-subtree-mainline: 98a32736d6
git-subtree-split: bf39923f9c

trivionomicon/templates/system-flake/pkgs/hello-world/hello-world.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main()
+{
+	printf("Hello, world!\n");
+	return 0;
+}