Lua: Add Lua plugin support

Adds basic support for writing Plugins using the lua scripting language.
Lua Plugins are registered just as native plugins are and can be enabled
or disabled via the plugin dialog.

see src/plugins/lua/README.md for further details.

Change-Id: I9f4d15e9632c46e1c6c132bcd0bbcdd70b150640
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/lua/bindings/hook.cpp

@@ -0,0 +1,65 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "../luaengine.h"
+
+#include <coreplugin/editormanager/editormanager.h>
+
+namespace Lua {
+
+class Hook : public QObject
+{
+    Q_OBJECT
+
+public:
+    Hook(QObject *source);
+
+signals:
+    void trigger(sol::table &args);
+};
+
+Hook::Hook(QObject *source)
+    : QObject(source)
+{}
+
+namespace Internal {
+
+void addHookModule()
+{
+    LuaEngine::autoRegister([](sol::state_view lua) {
+        auto connection = lua.new_usertype<QMetaObject::Connection>("QMetaConnection",
+                                                                    sol::no_constructor);
+
+        auto hook = lua.new_usertype<Hook>(
+            "Hook",
+            sol::no_constructor,
+            "connect",
+            [](Hook *hook, sol::function func) -> QMetaObject::Connection {
+                QMetaObject::Connection con
+                    = QObject::connect(hook, &Hook::trigger, [func](sol::table args) {
+                          auto res = LuaEngine::void_safe_call(func, args);
+                          QTC_CHECK_EXPECTED(res);
+                      });
+                return con;
+            },
+            "disconnect",
+            [](Hook *, QMetaObject::Connection con) { QObject::disconnect(con); });
+    });
+
+    LuaEngine::registerHook("editors.documentOpened", [](sol::function func) {
+        QObject::connect(Core::EditorManager::instance(),
+                         &Core::EditorManager::documentOpened,
+                         [func](Core::IDocument *document) { func(document); });
+    });
+    LuaEngine::registerHook("editors.documentClosed", [](sol::function func) {
+        QObject::connect(Core::EditorManager::instance(),
+                         &Core::EditorManager::documentClosed,
+                         [func](Core::IDocument *document) { func(document); });
+    });
+}
+
+} // namespace Internal
+
+} // namespace Lua
+
+#include "hook.moc"