Wiki addition: Accessory bonus effect.

After doing the research for myself, I took the liberty to create a wiki page showing the actual effects of accessories (instead of relying on DeNA's "translation").

https://www.reddit.com/r/FFRecordKeeper/wiki/index/gear/gear_bonus_effect

It's titled "gear_bonus_effect" because the goal is to add not only accessories, but all kinds of gear.

If there's anything wrong or you have anything to add (I don't have the infamous Ice Ring since I didn't complete Parade Float), obviously, feel free to edit. The information is based on game code json.

PS.: First time I saw this accessory. It was form a skipped event...