Retaining item attributes when adding to new container

[ushort]

Current Behavior

Assigning attributes to item then unequipping (and probably trading) said item would lose attributes. This is due to the fact that unequipping items and trading transfer the item to new container using

rsmod/game/src/main/kotlin/gg/rsmod/game/model/container/ItemContainer.kt

Line 213 in 8cd9240

fun add(item: Int, amount: Int = 1, assureFullInsertion: Boolean = true, forceNoStack: Boolean = false, beginSlot: Int = -1): ItemTransaction {

which only retains item id and amount.

Expected Behavior

Attributes should carry over when creating the new item and adding to new container. Possibly send the item object itself then when creating new item use

rsmod/game/src/main/kotlin/gg/rsmod/game/model/item/Item.kt

Line 65 in 266684c

fun copyAttr(other: Item): Item {

Steps to Reproduce the Problem

1. Assign an attribute to an equippable item such as ItemAttribute.CHARGES
2. Equip then unequip the item and attributes will dissapear
3. Fix :^]

[Tomm0017]

Blocked by #127.

Will be revisited once above system is in place.