Prefill the file dialog with the old name when renaming a file

[dawedawe]

WHAT

🤖 Generated by Copilot at ca660ec

Added new commands for duplicating and creating files in Solution Explorer. Modified createNewFileDialg function to accept a prefilled parameter for the file path input.

🤖 Generated by Copilot at ca660ec

createNewFileDialog prefilled with existing file autumn of copying

:sparkles::recycle::file_folder:

WHY

I often see myself just changing a few characters when renaming a file. In this scenario, having the old name prefilled in the text box is quite helpful IMHO.

HOW

🤖 Generated by Copilot at ca660ec

• Add prefilled parameter to createNewFileDialg function to allow editing existing file name (link)
• Implement "Duplicate file" command by calling createNewFileDialg with prefilled set to last segment of virtual path (link)
• Implement "New file relative to selected file" and "New file relative to project file" commands by calling createNewFileDialg with prefilled set to None (link, link, link)

[MangelMaxime]

You beat me on this one @dawedawe thank you for sending the PR :)