Gold bar coin pile tweaking

### Discussed in https://github.com/Digitalroot-Valheim/Digitalroot.Valheim.GoldBars/discussions/9

<div type='discussions-op-text'>

<sup>Originally posted by **Butters1984** February 16, 2022</sup>
is it possible to be able to edit coinpile to 999 goldcoins to create 1 gold bar = 999?</div>