Import missing modules from the old azerothshard system

[Yehonal]

Imported modules

• mod-as-common (previously azerothshard)
• mod-as-platform (previously AZTH)
• mod-arena-solo-3v3
• mod-guildhouse
• mod-hearthstone-mode
• mod-playerstats
• mod-pvp-mode
• mod-pvpitemlevel
• mod-smartstone
• mod-timewalking
• mod-tournament (previously AzerothTournament)
• mod-xp-rates
• phasedimensions
• smartstone-app-loot-mod
• TournamentSet
• Jukebox
• DonationVendor: store unlimited items (collection-like)
• CrossFaction : improve crossfaction experience with some custom checks
• BGItemLevel: disable access to BGs when you wear equip with higher item levels (configurable)
• ExtraItems: custom vanity items etc
• SQL files: all custom SQL with vendors etc.