Throw early error if a format requires a non-existent mod
Throw early error if a format requires a non-existent mod

This is possible now that the list of mods is loaded just before the formats, and makes debugging PS mods issues much easier.

hayleysworld/serenityc9,Ecuacion/Lumen-Pokemon-Showdown,theodelhay/test,piiiikachuuu/Pokemon-Showdown,PrimalGallade45/Dropp-Pokemon-Showdown,urkerab/Pokemon-Showdown,bai2/Dropp,forbiddennightmare/Pokemon-Showdown-1,Lord-Haji/SpacialGaze,xfix/Pokemon-Showdown,PrimalGallade45/Dropp-Pokemon-Showdown,xfix/Pokemon-Showdown,PS-Spectral/Spectral,psnsVGC/Wish-Server,Syurra/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,ehk12/coregit,superman8900/Pokemon-Showdown,zek7rom/SpacialGaze,EienSeiryuu/Pokemon-Showdown,psnsVGC/Wish-Server,k3naan/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,DesoGit/Tsunami_PS,DB898/theregalias,Firestatics/omega,Sora-League/Sora,Vacate/Pokemon-Showdown,Lord-Haji/SpacialGaze,Guernouille/Pokemon-Showdown,KewlStatics/Shit,k3naan/Pokemon-Showdown,ZeroParadox/ugh,Firestatics/omega,ShowdownHelper/Saffron,DarkSuicune/Pokemon-Showdown,Ecuacion/Lumen-Pokemon-Showdown,yashagl/yash-showdown,ShowdownHelper/Saffron,AWailOfATail/Pokemon-Showdown,kupochu/Pokemon-Showdown,xfix/Pokemon-Showdown,xCrystal/Pokemon-Showdown,Mystifi/Exiled,kuroscafe/Paradox,urkerab/Pokemon-Showdown,TheManwithskills/COC,Hidden-Mia/Roleplay-PS,NoahVSGamingYT/Pokemon-Showdown,Flareninja/Showdown-Boilerplate,Ecuacion/Pokemon-Showdown,EmmaKitty/Pokemon-Showdown,Firestatics/Firestatics46,KaitoV4X/Showdown,lFernanl/Lumen-Pokemon-Showdown,TheDiabolicGift/Showdown-Boilerplate,ScottehMax/Pokemon-Showdown,Vacate/Pokemon-Showdown,TheManwithskills/Server---Thermal,arkanox/MistShowdown,Neosweiss/Pokemon-Showdown,gustavo515/final,sama2/Lumen-Pokemon-Showdown,Neosweiss/Pokemon-Showdown,KewlStatics/Shit,SolarisFox/Pokemon-Showdown,DarkSuicune/Kakuja-2.0,Zarel/Pokemon-Showdown,SilverTactic/Showdown-Boilerplate,abrulochp/Dropp-Pokemon-Showdown,jd4564/Pokemon-Showdown,TheManwithskills/Server---Thermal,JellalTheMage/PS-,megaslowbro1/Pokemon-Showdown,HoeenCoder/SpacialGaze,azum4roll/Pokemon-Showdown,Mystifi/Exiled,Celecitia/Plux-Pokemon-Showdown,KewlStatics/Alliance,panpawn/Gold-Server,Git-Worm/City-PS,jumbowhales/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,MeliodasBH/Articuno-Land,lAlejandro22/lolipoop,danpantry/Pokemon-Showdown,HoeenCoder/SpacialGaze,QuiteQuiet/Pokemon-Showdown,cadaeic/Pokemon-Showdown,Pokemon-Devs/Pokemon-Showdown,Irraquated/Pokemon-Showdown,PrimalGallade45/Lumen-Pokemon-Showdown,kotarou3/Krister-Pokemon-Showdown,gustavo515/gashoro,Git-Worm/City-PS,Enigami/Pokemon-Showdown,kuroscafe/Showdown-Boilerplate,KewlStatics/Showdown-Template,svivian/Pokemon-Showdown,Firestatics/Omega-Alpha,ehk12/bigbangtempclone,Irraquated/Showdown-Boilerplate,danpantry/Pokemon-Showdown,lFernanl/Pokemon-Showdown,hayleysworld/serenityc9,Pokemon-Devs/Pokemon-Showdown,abrulochp/Dropp-Pokemon-Showdown,brettjbush/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,MeliodasBH/boarhat,superman8900/Pokemon-Showdown,hayleysworld/Showdown-Boilerplate,Irraquated/Pokemon-Showdown,JennyPRO/Jenny,JellalTheMage/Jellals-Server,azum4roll/Pokemon-Showdown,Firestatics/Omega-Alpha,sirDonovan/Pokemon-Showdown,Elveman/RPCShowdownServer,Flareninja/Showdown-Boilerplate,TbirdClanWish/Pokemon-Showdown,Zarel/Pokemon-Showdown,Zarel/Pokemon-Showdown,PS-Spectral/Spectral,TheManwithskills/DS,TheManwithskills/COC,CreaturePhil/Showdown-Boilerplate,hayleysworld/serenity,Hidden-Mia/Roleplay-PS,AustinXII/Pokemon-Showdown,Guernouille/Pokemon-Showdown,yashagl/yash-showdown,ZestOfLife/PSserver,Lauc1an/Perulink-Showdown,SilverTactic/Dragotica-Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Volcos/SpacialGaze,TheManwithskills/serenity,aakashrajput/Pokemon-Showdown,Pikachuun/Pokemon-Showdown-SMCMDM,SolarisFox/Pokemon-Showdown,KewlStatics/Pokeindia-Codes,Wando94/Pokemon-Showdown,HoeenCoder/SpacialGaze,megaslowbro1/Pokemon-Showdown-Server-for-megaslowbro1,AWailOfATail/awoat,TheFenderStory/Showdown-Boilerplate,yashagl/pokemon-showdown,SSJGVegito007/Vegito-s-Server,Irraquated/Pokemon-Showdown,ShowdownHelper/Saffron,TheManwithskills/Server,panpawn/Pokemon-Showdown,JellalTheMage/Jellals-Server,MeliodasBH/Articuno-Land,ScottehMax/Pokemon-Showdown,Nineage/Origin,Articuno-I/Pokemon-Showdown,Syurra/Pokemon-Showdown,abulechu/Dropp-Pokemon-Showdown,ankailou/Pokemon-Showdown,Pablo000/aaa,xCrystal/Pokemon-Showdown,TheManwithskills/DS,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,TheManwithskills/Creature-phil-boiler,ZestOfLife/FestiveLife,SSJGVegito007/Vegito-s-Server,Kevinxzllz/PS-Openshift-Server,BlazingAura/Showdown-Boilerplate,Kokonoe-san/Glacia-PS,SkyeTheFemaleSylveon/Pokemon-Showdown,Nineage/Origin,CharizardtheFireMage/Showdown-Boilerplate,megaslowbro1/Pokemon-Showdown,Wando94/Spite,DB898/theregalias,Bryan-0/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,ZestOfLife/FestiveLife,Flareninja/Pokemon-Showdown,TheManwithskills/Server,DesoGit/Tsunami_PS,sama2/Dropp-Pokemon-Showdown,hayleysworld/serenityserver,TheManwithskills/serenity,TheManwithskills/Dusk--Showdown,ehk12/coregit,Firestatics/Firestatics46,Kokonoe-san/Glacia-PS,bai2/Dropp,anubhabsen/Pokemon-Showdown,TheManwithskills/Creature-phil-boiler,KewlStatics/Showdown-Template,Alpha-Devs/Alpha-Server,Lord-Haji/SpacialGaze,brettjbush/Pokemon-Showdown,AbsolitoSweep/Absol-server,ZestOfLife/PSserver,Alpha-Devs/OmegaRuby-Server,aakashrajput/Pokemon-Showdown,MeliodasBH/boarhat,kuroscafe/Showdown-Boilerplate,TheFenderStory/Showdown-Boilerplate,sama2/Dropp-Pokemon-Showdown,javi501/Lumen-Pokemon-Showdown,Pikachuun/Pokemon-Showdown-SMCMDM,Lauc1an/Perulink-Showdown,ZeroParadox/BlastBurners,Ecuacion/Pokemon-Showdown,ZeroParadox/ugh,piiiikachuuu/Pokemon-Showdown,JellalTheMage/PS-,jumbowhales/Pokemon-Showdown,ankailou/Pokemon-Showdown,Volcos/SpacialGaze,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,abulechu/Dropp-Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,gustavo515/batata,AbsolitoSweep/Absol-server,scotchkorean27/Pokemon-Showdown,HoeenCoder/SpacialGaze,SilverTactic/Dragotica-Pokemon-Showdown,jumbowhales/Pokemon-Showdown,xCrystal/Pokemon-Showdown,PrimalGallade45/Lumen-Pokemon-Showdown,jd4564/Pokemon-Showdown,TheFenderStory/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,EmmaKitty/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Elveman/RPCShowdownServer,xfix/Pokemon-Showdown,SilverTactic/Showdown-Boilerplate,kuroscafe/Paradox,forbiddennightmare/Pokemon-Showdown-1,megaslowbro1/Pokemon-Showdown-Server-for-megaslowbro1,AWailOfATail/awoat,Kevinxzllz/PS-Openshift-Server,arkanox/MistShowdown,scotchkorean27/Pokemon-Showdown,gustavo515/batata,lFernanl/Pokemon-Showdown,Mystifi/Exiled,hayleysworld/serenityserver,Sora-League/Sora,yashagl/pokemon-showdown,TheFenderStory/Pokemon-Showdown,BlazingAura/Showdown-Boilerplate,theodelhay/test,panpawn/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,hayleysworld/Showdown-Boilerplate,CreaturePhil/Showdown-Boilerplate,Enigami/Pokemon-Showdown,anubhabsen/Pokemon-Showdown,Irraquated/Showdown-Boilerplate,Sora-League/Sora,JennyPRO/Jenny,Alpha-Devs/Alpha-Server,TheDiabolicGift/Showdown-Boilerplate,Flareninja/Pokemon-Showdown,lFernanl/Lumen-Pokemon-Showdown,kotarou3/Krister-Pokemon-Showdown,DesoGit/TsunamiPS,urkerab/Pokemon-Showdown,DarkSuicune/Kakuja-2.0,hayleysworld/serenity,javi501/Lumen-Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,TheManwithskills/Dusk--Showdown,panpawn/Gold-Server,Celecitia/Plux-Pokemon-Showdown,DesoGit/TsunamiPS,KewlStatics/Alliance,Wando94/Pokemon-Showdown,megaslowbro1/Showdown-Server-again,Wando94/Spite,lAlejandro22/lolipoop,Pablo000/aaa,Enigami/Pokemon-Showdown,cadaeic/Pokemon-Showdown,megaslowbro1/Showdown-Server-again,xfix/Pokemon-Showdown,Articuno-I/Pokemon-Showdown,gustavo515/gashoro,KaitoV4X/Showdown,TheManwithskills/New-boiler-test,gustavo515/test,ehk12/bigbangtempclone,DesoGit/Tsunami_PS,CreaturePhil/Showdown-Boilerplate,PS-Spectral/Spectral,kupochu/Pokemon-Showdown,sama2/Lumen-Pokemon-Showdown,CharizardtheFireMage/Showdown-Boilerplate,TheManwithskills/New-boiler-test,SkyeTheFemaleSylveon/Pokemon-Showdown,NoahVSGamingYT/Pokemon-Showdown,gustavo515/final,Alpha-Devs/OmegaRuby-Server,TbirdClanWish/Pokemon-Showdown,ZeroParadox/BlastBurners,KewlStatics/Pokeindia-Codes,gustavo515/test,zek7rom/SpacialGaze,Enigami/Pokemon-Showdown,panpawn/Gold-Server