Studio: Add Song of the Day functionality (#2848)
Studio: Add Song of the Day functionality (#2848)

Requested by #Don't Lose

This also fixes the check for it a user can talk in the set command to be the same check throughout PS.

This also fixes escaping HTML for the set artist in two specific instances.
PS-Spectral/Spectral,AnaRitaTorres/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,Zarel/Pokemon-Showdown,urkerab/Pokemon-Showdown,AustinXII/Pokemon-Showdown,HoeenCoder/SpacialGaze,Git-Worm/City-PS,DesoGit/Tsunami_PS,EienSeiryuu/Pokemon-Showdown,jd4564/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,jumbowhales/Pokemon-Showdown,KewlStatics/Alliance,PS-Spectral/Spectral,Bryan-0/Pokemon-Showdown,Git-Worm/City-PS,danpantry/Pokemon-Showdown,Enigami/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,svivian/Pokemon-Showdown,xCrystal/Pokemon-Showdown,SolarisFox/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Sora-League/Sora,zek7rom/SpacialGaze,svivian/Pokemon-Showdown,Mystifi/Exiled,Guernouille/Pokemon-Showdown,panpawn/Gold-Server,SolarisFox/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,KewlStatics/Shit,sirDonovan/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Mystifi/Exiled,Lord-Haji/SpacialGaze,Lord-Haji/SpacialGaze,danpantry/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,Enigami/Pokemon-Showdown,Guernouille/Pokemon-Showdown,Zarel/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,Zarel/Pokemon-Showdown,ShowdownHelper/Saffron,DarkSuicune/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,KewlStatics/Shit,xfix/Pokemon-Showdown,jd4564/Pokemon-Showdown,Enigami/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,cadaeic/Pokemon-Showdown,azum4roll/Pokemon-Showdown,Kokonoe-san/Glacia-PS,svivian/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,HoeenCoder/SpacialGaze,Bryan-0/Pokemon-Showdown,panpawn/Pokemon-Showdown,xCrystal/Pokemon-Showdown,Enigami/Pokemon-Showdown,xCrystal/Pokemon-Showdown,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Volcos/SpacialGaze,QuiteQuiet/Pokemon-Showdown,PS-Spectral/Spectral,DesoGit/Tsunami_PS,panpawn/Gold-Server,Sora-League/Sora,DesoGit/Tsunami_PS,Mystifi/Exiled,xfix/Pokemon-Showdown,Kokonoe-san/Glacia-PS,cadaeic/Pokemon-Showdown,HoeenCoder/SpacialGaze,xfix/Pokemon-Showdown,ShowdownHelper/Saffron,AustinXII/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,xfix/Pokemon-Showdown,HoeenCoder/SpacialGaze,urkerab/Pokemon-Showdown,Volcos/SpacialGaze,ShowdownHelper/Saffron,urkerab/Pokemon-Showdown,svivian/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,azum4roll/Pokemon-Showdown,panpawn/Pokemon-Showdown,xfix/Pokemon-Showdown,Sora-League/Sora,aakashrajput/Pokemon-Showdown,zek7rom/SpacialGaze,panpawn/Gold-Server,Lord-Haji/SpacialGaze,KewlStatics/Alliance