Cargo - Add object variable for custom interaction delay

[TheCandianVendingMachine]

When merged this pull request will:

• Add variable on items which will set how long it takes to interact with the item
• Add function to get this delay

When developing a feature for an in-house mod, we ran into a scenario where we want itemSize = 0 but still allow some time for the interaction to occur. I figured adding a variable to each item would allow this functionality without much hassle.

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