ds1david/lenovo-grub-theme ? reverse-engineered prompt

Build me a simple Lenovo style GRUB theme that looks like the screenshot in the README, with the same background image, icons, and selection styling. I want it to be something I can install on my machine with one easy script, and have it set up the theme files in the right place so GRUB can use them after I run it.

Please make sure the install process is straightforward, handles the common setup cleanly, and leaves me with a working theme I can enable right away. If anything needs a current reference from online docs, feel free to look it up.

Keep it lightweight and focused on the visual theme and installer, since I mainly want a polished boot menu that matches the Lenovo look.