Function copy_img_folder 

pub fn copy_img_folder(
    source_file: &Path,
    dest_file: &Path,
) -> Result<(), Error>

Copies the img folder from source directory to destination directory.

Docusaurus projects often have img folders alongside markdown files containing referenced images. This function preserves that structure in the output.

Arguments

• source_file: Path to the source markdown file
• dest_file: Path to the destination markdown file

Returns

• Ok(()) if img folder doesn’t exist or is successfully copied
• Err if directory creation or file copying fails

Behavior

• If no img folder exists in the source directory, the function succeeds silently
• If img folder exists, creates it in destination and copies all files
• Preserves original filenames