refactor: split up the utilities file into smaller modules

include/list.h

@@ -0,0 +1,24 @@
+#ifndef LIST_H
+#define LIST_H
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define LIST_INIT_CAPACITY 4
+
+typedef struct {
+    void** items;
+    size_t len;
+    size_t capacity;
+    size_t item_size;
+} List;
+
+List* list_new(size_t item_size);
+int list_push(List*, void*);
+int list_remove(List*, const void*, int (*compare)(const void*, const void*));
+void list_free(List*);
+void* list_binary_search(List*, const void*, int (*compare)(const void*, const void*));
+
+#endif // LIST_H