Battle - V2

• Server now generates up to 7 fights (relying on army units count on each side + wall level)
• Server now keep track of healthy/dead unit counts.
• Battle page can now display the pending fights and the army statistics.
• Fights are now updated each time we trigger a tick
• Log dead units
• Kill Generals that lost the Battle
• Log Beaten General
• Temporary Battle resolution got removed. A Battle should end if one side doesn't have any remaining units.
• World are now ticking every 2 minutes automatically (Movements, Battles and Resources)

Post Battle cleanup :

• update all armies depending outcome (remove all dead units in all armies)
• Cleanup remaining Fight/FightingUnit