Implement strongly typed IDs to differentiate between database ID and instance ID

[MeikelLP]

see https://andrewlock.net/using-strongly-typed-entity-ids-to-avoid-primitive-obsession-part-1/

Most of the IDs of any sort are uints in QCX. Sadly this type does cover multiple use cases:

• Instance IDs: Entities on the server (mobs, players, npcs) all have their unique ID which identifies them on the server (this ID does not persist)
• Database IDs: Some entities are tracked in the database (i.e. players). They obviously have a unique key (primary key)

It's not clear which use case the type uint represents in each case. Mistakes can be made easily. To prevent this we can implement custom ID types which are still uints but you have to explicitly cast them to change one to another - making transitions very clear - if ever needed.