Jayou, The River City Area

I had Discord set up the last area for Parvpora! It is a merchant/artisan/gambling city nestled within the five rivers northeast of Karith. I will get the map set up so it can link to it!

I've updated the wiki page on linguistics, added the shortcut link, I've edited the synth guide where stuff is, and I added tags to Zets'Ki Cradle and Jayou to reflect them. Also added in the half-angels to the description for Zets'Ki since I know it was missing. The short description for Zets'Ki now says it and I'll fit it in somewhere in the description as well since I know it was confusing people.