Added basic online list

contact_list.h

@@ -0,0 +1,13 @@
+#ifndef CONTACT_LIST_H
+#define CONTACT_LIST_H
+
+struct contact_list {
+    char **contacts;
+    int size;
+};
+
+void contact_list_clear(void);
+int contact_list_add(char *contact);
+struct contact_list *get_contact_list(void);
+
+#endif