Add the CLion practice projects

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Login/library.h

@@ -0,0 +1,14 @@
+#ifndef LOGIN_LIBRARY_H
+#define LOGIN_LIBRARY_H
+
+typedef void *data;
+
+void crear(data *datos);
+
+void setUUID(short a, data *datos);
+
+void setusr(char *a, data *datos);
+
+void setpas(char *a, data *datos);
+
+#endif //LOGIN_LIBRARY_H