Refactored project structure, added multithreaded echo server and prime checking server, updated tests.

data.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <stdio.h>
-
+#include <winsock2.h>
 typedef struct CharArray {
     size_t size;
     size_t capacity;
@@ -11,4 +11,8 @@ char_array_t *char_array_create(int size);
 void char_array_destroy(char_array_t *array);
 void char_array_append(char_array_t *array, char *value, size_t length);
 void char_array_print(const char_array_t *array);
-void char_array_wipe(char_array_t *array);
+void char_array_wipe(char_array_t *array);
+bool char_array_has_char(char_array_t *array, char c);
+char *char_array_get_until_char(char_array_t *array, char c);
+
+SOCKET get_listen_socket();