Adding a community-requested list of Gecko and Action Replay codes to the allowlist. Many of these codes were from the wiki and are being added to Dolphin's repo for the first time.

These haven't worked since 2008 (0b5fed62c1b92017ce43a87ba223763a75e7fbef).

Forcing people to use hacks is a bad idea in general, and there are
two practical problems with doing it for immediate XFB in particular:

1. It breaks the GC IPL, which some users run when launching games.

2. Competitive players don't necessarily want the lowest possible
   latency - they might want the latency that's the closest to console,
   so if they're playing locally with a low-latency monitor, they might
   not want to use immediate XFB. (This isn't a theoretical concern -
   I've seen Melee players want to increase their latency.)

Besides, it feels arbitrary that just these five specific games should
have immediate XFB forced on.

Thanks to FAR - Find And Replace

That took a few hours...