[Quest API] Add missing Item Methods to Perl/Lua. (#3464)

# Perl
- Add `$questitem->AddEXP(exp)`.
- Add `$questitem->ClearTimers()`.
- Add `$questitem->Clone()`.
- Add `$questitem->DeleteCustomData(identifier)`.
- Add `$questitem->GetAugmentItemID(slot_id)`.
- Add `$questitem->GetAugmentType()`.
- Add `$questitem->GetColor()`.
- Add `$questitem->GetCustomData(identifier)`.
- Add `$questitem->GetCustomDataString()`.
- Add `$questitem->GetEXP()`.
- Add `$questitem->GetItem(slot_id)`.
- Add `$questitem->GetItemID(slot_id)`.
- Add `$questitem->GetItemScriptID()`.
- Add `$questitem->GetKillsNeeded()`.
- Add `$questitem->GetMaxEvolveLevel()`.
- Add `$questitem->GetPrice()`.
- Add `$questitem->GetTotalItemCount()`.
- Add `$questitem->IsAmmo()`.
- Add `$questitem->IsAugmentable()`.
- Add `$questitem->IsAugmented()`.
- Add `$questitem->IsEquipable(slot_id)`.
- Add `$questitem->IsEquipable(race_bitmask, class_bitmask)`.
- Add `$questitem->IsExpendable()`.
- Add `$questitem->IsInstanceNoDrop()`.
- Add `$questitem->IsWeapon()`.
- Add `$questitem->SetAttuned(is_attuned)`.
- Add `$questitem->SetColor(color)`.
- Add `$questitem->SetCustomData(identifier, bool_value)`.
- Add `$questitem->SetCustomData(identifier, float_value)`.
- Add `$questitem->SetCustomData(identifier, int_value)`.
- Add `$questitem->SetCustomData(identifier, string_value)`.
- Add `$questitem->SetEXP(exp)`.
- Add `$questitem->SetInstanceNoDrop(is_attuned)`.
- Add `$questitem->SetPrice(price)`.
- Add `$questitem->SetScaling(is_scaling)`.
- Add `$questitem->SetTimer(timer_name, timer)`.
- Add `$questitem->StopTimer(timer_name)`.

# Lua
- Add `iteminst:GetName()`.
- Add `iteminst:IsAttuned()`.
- Add `iteminst:ItemSay(text)`.
- Add `iteminst:ItemSay(text, language_id)`.
- Add `iteminst:SetAttuned(is_attuned)`.

# Notes
- Cleaned up return types and parameter types that were mismatched.
- Removed `SetItem` from Lua as it wasn't used.
- Removed unused parameter in `GetUnscaledItem` in Lua.
- I plan to add Perl ItemData support after this makes its way in, so the missing methods like the `GetItem` overload will be added then.

common/languages.h

@@ -48,5 +48,7 @@
 #define LANG_HADAL			26
 #define LANG_UNKNOWN	27
 
+#define MAX_LANGUAGE_SKILL 100
+
 #endif