* Core/Misc: Improvement item durability repair logic

* Move item repair cost calculation logic from Player::DurabilityRepair to Item::CalculateDurabilityRepairCost
* Make item repair cost calculation more congruent with client logic (std::round)
* Do not repair items if player does not have enough money to pay for the repair of all items at once
* Withdrawing money from guild bank only once to avoid spam in the guild bank log and reduce number of transactions in the database

src/server/game/Guilds/Guild.cpp

@@ -3073,6 +3073,15 @@ bool Guild::ChangeMemberRank(CharacterDatabaseTransaction& trans, ObjectGuid gui
     return false;
 }
 
+uint64 Guild::GetMemberAvailableMoneyForRepairItems(ObjectGuid guid) const
+{
+    Member const* member = GetMember(guid);
+    if (!member)
+        return 0;
+
+    return std::min(m_bankMoney, static_cast<uint64>(_GetMemberRemainingMoney(member)));
+}
+
 bool Guild::IsMember(ObjectGuid guid) const
 {
     Members::const_iterator itr = m_members.find(guid.GetCounter());