fix: Auto-select name for editing when creating new files/folders

When creating a new file or folder via the project navigator context menu,
the name is now automatically selected for editing (matching the behavior
already present in 'New File from Clipboard').

This matches standard IDE behavior where newly created items immediately
enter rename mode, allowing the user to type a custom name without an
extra step.

Fixes #2029

Author: william-laverty

CodeEdit/Features/NavigatorArea/ProjectNavigator/OutlineView/ProjectNavigatorMenuActions.swift

@@ -90,6 +90,7 @@ extension ProjectNavigatorMenu {
             if let newFile = try workspace?.workspaceFileManager?.addFile(fileName: "untitled", toFile: item) {
                 workspace?.listenerModel.highlightedFileItem = newFile
                 workspace?.editorManager?.openTab(item: newFile)
+                renameFile()
             }
         } catch {
             let alert = NSAlert(error: error)
@@ -147,6 +148,7 @@ extension ProjectNavigatorMenu {
         do {
             if let newFolder = try workspace?.workspaceFileManager?.addFolder(folderName: "untitled", toFile: item) {
                 workspace?.listenerModel.highlightedFileItem = newFolder
+                renameFile()
             }
         } catch {
             let alert = NSAlert(error: error)