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

src/tui.c

@@ -2,6 +2,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include "main.h"
+
 
 void uartDialog(char *uart_adress, int terminal_x, int terminal_y)
 {