emulators/Ymir: Sega Saturn emulator

Features:
 - Load games from MAME CHD, BIN+CUE, IMG+CCD, MDF+MDS or ISO files
 - Automatic IPL (BIOS) ROM detection
 - Automatic region switching
 - Up to two players with standard Control Pads or 3D Control Pads on
   both ports (more to come)
 - Fully customizable keybindings
 - Backup RAM, DRAM and ROM cartridges (more to come)
 - Integrated backup memory manager to import and export saves, and
   transfer between internal and cartridge RAM
 - Save states
 - Rewinding (up to one minute at 60 fps), turbo speed, frame step
   (forwards and backwards)
 - Full screen mode with VRR support and low input lag
 - Optional deinterlaced/progressive rendering of high resolution modes
 - A work-in-progress feature-rich debugger

https://github.com/StrikerX3/Ymir



PR:		288495
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>