feat: day 2

input_handler.h

@@ -0,0 +1,13 @@
+//
+// Created by Lennart on 02/12/2023.
+//
+
+#include <stdio.h>
+
+#ifndef ADVENT_OF_CODE_2023_INPUT_HANDLER_H
+
+const char* read_line(FILE *f, char **buffer, int *capacity);
+
+#define ADVENT_OF_CODE_2023_INPUT_HANDLER_H
+
+#endif //ADVENT_OF_CODE_2023_INPUT_HANDLER_H