Major refactor of codebase

include/mm/kmalloc.h

@@ -0,0 +1,9 @@
+#include <error.h>
+#include <stddef.h>
+#include <stdint.h>
+
+void _kmalloc_init(void);
+
+void *kmalloc(size_t size);
+void *kzalloc(size_t size);
+kstatus kfree(void *addr);