feat(args): args_handler error handling and print_usage

src/main.c

@@ -1,8 +1,19 @@
 // all includes
 
+#include <stdio.h>
+
+#include "utils/args/args.h"
+
 int main(int argc, char **argv)
 {
-    (void)argc;
-    (void)argv;
+    struct args_options options;
+    int r = args_handler(argc, argv, &options);
+    if (r != 0)
+    {
+        print_usage(stderr, argv[0]);
+        return 2;
+    }
+
+    args_print(&options);
     return 0;
 }