Serbian language. New statue. Balance changes. QoL

GENERAl
- Added Serbian language.
- If in a match no enemy units are killed for a long time, a draw is declared.
- Added new decorative statue - Water Tiger.
- The time between disconnecting a player and automatically destroying his main building is increased from 2 to 3 minutes.
BALANCE
Europe
- Crossbow: shot damage reduced from 35 to 30, time between attacks reduced from 4.5 to 3.2 sec, maximum attack distance reduced from 70 to 50, melee damage increased from 6 to 12
Western Europe
- Pikeman: damage increased from 8 to 10
- Halberdier: damage increased from 11 to 13
- Onager: damage to buildings reduced from 40 to 30, turn speed is reduced by 30%, maximal attack distance decreased from 190 to 180
- Trebuchet: damage radius is enlarged by 50%, cost reduced from 0/800/250 to 0/750/200
- Musketeer: time between attacks reduced from 5 to 4.5 seconds, projectile dispersion reduced from 15% to 13%
Eastern Europe