Choice API: Add new side.choose function
Choice API: Add new side.choose function

Does the same thing as battle.choose, but without the autocommit.

Mystifi/Exiled,xCrystal/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,ShowdownHelper/Saffron,svivian/Pokemon-Showdown,urkerab/Pokemon-Showdown,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Zarel/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Sora-League/Sora,panpawn/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,Sora-League/Sora,Mystifi/Exiled,Enigami/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,HoeenCoder/SpacialGaze,Zarel/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,panpawn/Gold-Server,ShowdownHelper/Saffron,Sora-League/Sora,QuiteQuiet/Pokemon-Showdown,Enigami/Pokemon-Showdown,danpantry/Pokemon-Showdown,panpawn/Gold-Server,danpantry/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,xCrystal/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,DesoGit/Tsunami_PS,urkerab/Pokemon-Showdown,svivian/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,HoeenCoder/SpacialGaze,panpawn/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,Enigami/Pokemon-Showdown,Zarel/Pokemon-Showdown,xfix/Pokemon-Showdown,PS-Spectral/Spectral,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,Enigami/Pokemon-Showdown,svivian/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,Lord-Haji/SpacialGaze,CreaturePhil/Showdown-Boilerplate,Mystifi/Exiled,PS-Spectral/Spectral,sirDonovan/Pokemon-Showdown,urkerab/Pokemon-Showdown,Lord-Haji/SpacialGaze,ShowdownHelper/Saffron,DesoGit/Tsunami_PS,HoeenCoder/SpacialGaze,AWailOfATail/Pokemon-Showdown,panpawn/Gold-Server,AustinXII/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,DesoGit/Tsunami_PS,TbirdClanWish/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,xfix/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,Lord-Haji/SpacialGaze,HoeenCoder/SpacialGaze,CreaturePhil/Showdown-Boilerplate,PS-Spectral/Spectral,xCrystal/Pokemon-Showdown