LanguageClient: Indent code coming from the server

... if the client implementation requests it.
The server is not necessarily aware of our indentation style, so we
might have to apply it to the newly inserted code.

Change-Id: I43518575c7124568da42be3b04a28d7f352f6dc2
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/languageclient/client.h

@@ -207,6 +207,9 @@ public:
     using CustomInspectorTabs = QList<CustomInspectorTab>;
     virtual const CustomInspectorTabs createCustomInspectorTabs() { return {}; }
 
+    // Caller takes ownership
+    virtual TextEditor::RefactoringChangesData *createRefactoringChangesBackend() const;
+
 signals:
     void initialized(const LanguageServerProtocol::ServerCapabilities &capabilities);
     void capabilitiesChanged(const DynamicCapabilities &capabilities);