ClangFormat: Replace checks widget with editor

The existing approach utilizing the widget poses maintenance
challenges, primarily due to the dynamic nature of clang-format
settings across versions. The widget necessitates regeneration
for each new version, and compatibility issues arise when users
have different clang-format versions on their devices.

The updated solution adopts an Editor integrated with a yaml
language server, offering the ability to highlight and provide
code completion for the .clang-format file. This resolves the
widget regeneration issue and ensures compatibility with various
clang-format versions.

- Replaced the checks widget with an editor
- Introduced a line for yaml language server schema
in .clang-format files to enable autocompletion.
ToDo: Enhance schema accessibility without relying on this line.
- Added Ctrl+Space shortcut for autocompletion
- Added Ctrl+S shortcut for saving
- Eliminated outdated logic related to the checks widget
- Fixed copying and removal of clang-format settings

Change-Id: I2e3fbf19abe2f4df031f6ba5faffd47e07274346
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/languageclient/languageclientplugin.cpp

@@ -12,6 +12,7 @@
 #include <coreplugin/actionmanager/actionmanager.h>
 
 #include <extensionsystem/iplugin.h>
+#include <extensionsystem/pluginmanager.h>
 
 #include <QAction>
 #include <QMenu>
@@ -26,6 +27,7 @@ class LanguageClientPlugin final : public ExtensionSystem::IPlugin
 public:
     LanguageClientPlugin()
     {
+        setObjectName("LanguageClient");
         qRegisterMetaType<LanguageServerProtocol::JsonRpcMessage>();
     }
 
@@ -34,6 +36,24 @@ private:
     void extensionsInitialized() final;
     ShutdownFlag aboutToShutdown() final;
 
+    Q_SLOT void openDocument(Core::IDocument *document)
+    {
+        LanguageClientManager::openDocument(document);
+    }
+
+    Q_SLOT void closeDocument(Core::IDocument *document)
+    {
+        LanguageClientManager::closeDocument(document);
+    }
+
+    Q_SLOT void openEditor(Core::IEditor *editor) { LanguageClientManager::openEditor(editor); }
+
+    Q_SLOT void closeClientForDocument(TextEditor::TextDocument *document)
+    {
+        if (auto client = LanguageClientManager::clientForDocument(document))
+            client->closeDocument(document);
+    }
+
     LanguageClientOutlineWidgetFactory m_outlineFactory;
 };
 
@@ -57,6 +77,8 @@ void LanguageClientPlugin::initialize()
     inspectAction.setText(Tr::tr("Inspect Language Clients..."));
     inspectAction.addToContainer(Core::Constants::M_TOOLS_DEBUG);
     inspectAction.addOnTriggered(this, &LanguageClientManager::showInspector);
+
+    ExtensionSystem::PluginManager::addObject(this);
 }
 
 void LanguageClientPlugin::extensionsInitialized()
@@ -66,6 +88,7 @@ void LanguageClientPlugin::extensionsInitialized()
 
 ExtensionSystem::IPlugin::ShutdownFlag LanguageClientPlugin::aboutToShutdown()
 {
+    ExtensionSystem::PluginManager::removeObject(this);
     LanguageClientManager::shutdown();
     if (LanguageClientManager::isShutdownFinished())
         return ExtensionSystem::IPlugin::SynchronousShutdown;