help wanted
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説明
Many of the unscoped enums used in devilutionX can use enum class instead. This gives stronger type safety for things like Direction and allows unambiguous constructors/conversion functions in related classes (e.g. Displacement).
This does make it more difficult to cast back to an integral type so the usage of some enums (such as _item_indexes) will need to be evaluated to see if it's worth changing those from unscoped to scoped.