Convert native cheat codes to the RetroArch format

[eadmaster]

There a lot of cores currently that only support cheats in the RetroArch format, while this repo only provides codes in Native format (e.g. GameShark):

• https://docs.libretro.com/library/mupen64plus/#features
• https://docs.libretro.com/library/pcsx_rearmed/#features
• https://docs.libretro.com/library/flycast/#features
• https://docs.libretro.com/library/yabause/#features

This creates confusion among users, who assume cheat support is missing in these cores, while it is not the case actually: libretro/beetle-pce-fast-libretro#93 libretro/beetle-saturn-libretro#5

So i've made this quick and dirty script to convert the cheat tables format:
https://github.com/eadmaster/dotfiles/blob/main/bin/chtnative2retroarch.py

It's still missing support for encrypted/conditional/increment/activator codes, but i've found it's already working well in most cases.

Possibly it can be merged into the scraper script, to have the cheat tables converted automatically after download.