adds an exit entry to local boot which can hand the bood process back to the systems firmware and thereby help to boot from other devices without reboot
i tested it and it worked here in uefi and bios mode, but on some firmwares you have to do it twice cause uefi mode hands in to bios mode, but that can help to if you wish to switch to that mode and your firmware has no selection for the mode and handles one usb device as one entry...
When user install for example Windows in the reserved space of Ventoy USB stick in UEFI mode.
Windows will create part 3 as the EFI partition and when you boot the USB stick, the BIOS may skip Ventoy and directly boot the Windows.
To avoid this, we suggest to rename the directory name from EFI to VTEFI.
