Copilot: Add LSP plugin for Copilot

Fixes: QTCREATORBUG-27771
Change-Id: I1249b9a4492427208a70b3e21bf20ac668fc3c50
Reviewed-by: hjk <hjk@qt.io>

src/plugins/copilot/copilotplugin.cpp

@@ -0,0 +1,37 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "copilotplugin.h"
+
+#include "copilotclient.h"
+#include "copilotoptionspage.h"
+#include "copilotsettings.h"
+
+#include <coreplugin/icore.h>
+
+using namespace Utils;
+
+namespace Copilot {
+namespace Internal {
+
+void CopilotPlugin::initialize()
+{
+    CopilotSettings::instance().readSettings(Core::ICore::settings());
+
+    m_client = new CopilotClient();
+
+    connect(&CopilotSettings::instance(), &CopilotSettings::applied, this, [this]() {
+        if (m_client)
+            m_client->shutdown();
+        m_client = nullptr;
+        m_client = new CopilotClient();
+    });
+}
+
+void CopilotPlugin::extensionsInitialized()
+{
+    CopilotOptionsPage::instance().init();
+}
+
+} // namespace Internal
+} // namespace Copilot