Auto-select name for editing when creating new files/folders (#2029)

When creating a new file or folder in the project navigator, the name
field should automatically be selected for editing, matching standard
macOS UX expectations and Finder behavior.

The newFileFromClipboard() function already had this behavior by calling
renameFile() at the end. Applied the same pattern to newFile() and
newFolder().

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)