refactor: Introduce base class for RequestHandler (#125)

This will make it possible to write a mock implementation.

llmcore/RequestHandlerBase.cpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2024 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "RequestHandlerBase.hpp"
+
+namespace QodeAssist::LLMCore {
+
+RequestHandlerBase::RequestHandlerBase(QObject *parent)
+    : QObject(parent)
+{}
+
+RequestHandlerBase::~RequestHandlerBase() = default;
+
+} // namespace QodeAssist::LLMCore