Enhance Makefile and rpylib.c:

- Updated Makefile to streamline build process for main application and Python extension.
- Implemented C extension in rpylib.c for OpenAI communication, including chat and reset functionalities.

rpylib.c

@@ -51,9 +51,32 @@ static PyObject* rpylib_chat(PyObject *self, PyObject *args) {
     free(result);
     return py_result;
 }
-
+static PyObject* rpylib_prompt(PyObject *self, PyObject *args) {
+    const char *role = "user";
+    const char *message; 
+    if (!PyArg_ParseTuple(args, "s", &message)) {
+        return NULL;
+    }
+    char *result = openai_chat(role, message);
+    PyObject *py_result = PyUnicode_FromString(result);
+    free(result);
+    return py_result;
+}
+static PyObject* rpylib_system(PyObject *self, PyObject *args) {
+    const char *role = "system";
+    const char *message; 
+    if (!PyArg_ParseTuple(args, "s", &message)) {
+        return NULL;
+    }
+    char *result = openai_chat(role, message);
+    PyObject *py_result = PyUnicode_FromString(result);
+    free(result);
+    return py_result;
+}
 static PyMethodDef MyModuleMethods[] = {
     {"chat", rpylib_chat, METH_VARARGS, "Chat with OpenAI."},
+    {"prompt", rpylib_prompt, METH_VARARGS, "Prompt to OpenAI."},
+    {"system", rpylib_system, METH_VARARGS, "Add system message."},
     {"reset", rpylib_reset, METH_NOARGS, "Reset message history."},
     {NULL, NULL, 0, NULL}
 };