Design ventoy (support for setting different backgrounds for different folders).

[nguyen ha thai trong]

Thanks for the reply.
I didn't set the task to run some file. This is handled by Venntoy. Therefore, I do not create menuentry manually.
I set the task to change the appearance. Namely, each catalog has its own theme.

serhat100 only adds a small code in grub.cfg to boot linux iso files from any partition, has built-in functions for f7, f8 keys to switch back and forth with grubfm, g4efi, the rest is original ventoy1.0.64