core: Add initial command line options

Signed-off-by: Ian Moffett <ian@mirocom.org>

src/main.c

@@ -1,7 +1,47 @@
 #include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define CAV_VERSION "0.0.1"
+
+static void
+help(void)
+{
+    printf(
+        "Consume and vomit - blugh!\n"
+        "--------------------------\n"
+        "[-h]   Display this help menu\n"
+        "[-v]   Display the version\n"
+    );
+}
+
+static void
+version(void)
+{
+    printf(
+        "Consume and vomit - blugh!\n"
+        "--------------------------\n"
+        "Copyright (c) 2026, Ian Moffett\n"
+        "Version %s\n",
+        CAV_VERSION
+    );
+}
 
 int
-main(void)
+main(int argc, char **argv)
 {
+    int opt;
+
+    while ((opt = getopt(argc, argv, "hv")) != -1) {
+        switch (opt) {
+        case 'h':
+            help();
+            return -1;
+        case 'v':
+            version();
+            return -1;
+        }
+    }
+
     return 0;
 }