feature: a lot of stuff and got to a working command line ish

kernel/kprint.c

@@ -27,7 +27,7 @@ void kprint_register(kprint_handler handler) {
     // todo handle
 }
 
-void kprint(char *msg) {
+void kprint(const char *msg) {
     for (int i = 0; i < MAX_HANDLERS; ++i) {
         if (handlers[i] == NULL) {
             continue;