Add Dex repository to /opensource (#2809)
Add Dex repository to /opensource (#2809)

Apparently, a lot of people still don't know this is a thing, so this might be a good way of making people know it's actually a thing.
sirDonovan/Pokemon-Showdown,Zarel/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,azum4roll/Pokemon-Showdown,Guernouille/Pokemon-Showdown,ShowdownHelper/Saffron,AWailOfATail/Pokemon-Showdown,Sora-League/Sora,CreaturePhil/Showdown-Boilerplate,AustinXII/Pokemon-Showdown,Elveman/RPCShowdownServer,panpawn/Pokemon-Showdown,xCrystal/Pokemon-Showdown,DesoGit/Tsunami_PS,SolarisFox/Pokemon-Showdown,SolarisFox/Pokemon-Showdown,PS-Spectral/Spectral,zek7rom/SpacialGaze,CreaturePhil/Showdown-Boilerplate,xfix/Pokemon-Showdown,AustinXII/Pokemon-Showdown,KewlStatics/Shit,xfix/Pokemon-Showdown,Enigami/Pokemon-Showdown,Lord-Haji/SpacialGaze,QuiteQuiet/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,Sora-League/Sora,Git-Worm/City-PS,Guernouille/Pokemon-Showdown,KewlStatics/Alliance,HoeenCoder/SpacialGaze,Enigami/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,urkerab/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,urkerab/Pokemon-Showdown,xfix/Pokemon-Showdown,panpawn/Gold-Server,aakashrajput/Pokemon-Showdown,Enigami/Pokemon-Showdown,HoeenCoder/SpacialGaze,Volcos/SpacialGaze,sirDonovan/Pokemon-Showdown,PS-Spectral/Spectral,urkerab/Pokemon-Showdown,Enigami/Pokemon-Showdown,svivian/Pokemon-Showdown,zek7rom/SpacialGaze,jumbowhales/Pokemon-Showdown,KewlStatics/Alliance,EienSeiryuu/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,Sora-League/Sora,DarkSuicune/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,Elveman/RPCShowdownServer,Git-Worm/City-PS,TbirdClanWish/Pokemon-Showdown,PS-Spectral/Spectral,Mystifi/Exiled,danpantry/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,danpantry/Pokemon-Showdown,cadaeic/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,svivian/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,jd4564/Pokemon-Showdown,DesoGit/Tsunami_PS,xCrystal/Pokemon-Showdown,azum4roll/Pokemon-Showdown,cadaeic/Pokemon-Showdown,xCrystal/Pokemon-Showdown,panpawn/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Kokonoe-san/Glacia-PS,xfix/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Zarel/Pokemon-Showdown,Mystifi/Exiled,Pikachuun/Pokemon-Showdown,KewlStatics/Shit,DesoGit/Tsunami_PS,Lord-Haji/SpacialGaze,Zarel/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,xfix/Pokemon-Showdown,HoeenCoder/SpacialGaze,TbirdClanWish/Pokemon-Showdown,Lord-Haji/SpacialGaze,HoeenCoder/SpacialGaze,svivian/Pokemon-Showdown,Mystifi/Exiled,AWailOfATail/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Kokonoe-san/Glacia-PS,jd4564/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,ShowdownHelper/Saffron,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,panpawn/Gold-Server,ShowdownHelper/Saffron,panpawn/Gold-Server,Volcos/SpacialGaze