feat(api): add get_current_window call

Add prof_get_current_window API to retrieve the title of the currently active window, matching the titlebar display.

The feature is especially useful to track currently used plugin window.

src/plugins/python_api.c

@@ -415,6 +415,15 @@ python_api_get_current_recipient(PyObject* self, PyObject* args)
     }
 }
 
+static PyObject*
+python_api_get_current_window(PyObject* self, PyObject* args)
+{
+    allow_python_threads();
+    auto_gchar gchar* recipient = api_get_current_window();
+    disable_python_threads();
+    return Py_BuildValue("s", recipient);
+}
+
 static PyObject*
 python_api_get_current_muc(PyObject* self, PyObject* args)
 {
@@ -1530,6 +1539,7 @@ static PyMethodDef apiMethods[] = {
     { "send_line", python_api_send_line, METH_VARARGS, "Send a line of input." },
     { "notify", python_api_notify, METH_VARARGS, "Send desktop notification." },
     { "get_current_recipient", python_api_get_current_recipient, METH_VARARGS, "Return the jid of the recipient of the current window." },
+    { "get_current_window", python_api_get_current_window, METH_VARARGS, "Return title of the current window." },
     { "get_current_muc", python_api_get_current_muc, METH_VARARGS, "Return the jid of the room of the current window." },
     { "get_current_nick", python_api_get_current_nick, METH_VARARGS, "Return nickname in current room." },
     { "get_name_from_roster", python_api_get_name_from_roster, METH_VARARGS, "Return nickname in roster of barejid." },