Refactor header inclusions and add main.h; implement searchPersonByUUID and addTimeEvent functions in users.c

include/main.h

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#ifndef __MAIN_H__
+#define __MAIN_H__
+
+#define TRUE 1
+#define FALSE 0
+#define BYTE uint8_t
+#define MIN_X_TERMINAL_SIZE 80
+#define MIN_Y_TERMINAL_SIZE 30
+
+int main(int argc, char const **argv);
+
+#endif