guns/GunGolden.cs

Defines a GunGolden class inheriting from Gun that holds constants and simple accessor methods for crit chance, crit damage, and a description string.

Rough Code
public class GunGolden : Gun
{
	public const string ItemId = "gun_golden";

	private static int GetCritChance() => 20;
	private static int GetCritDamage() => 100;

	public static string Description() => $"+{GetCritChance()}% crit chance, +{GetCritDamage()}% crit damage";
}