- Made `NativeApi` into a `static class` (it's not intended to be instantiated)
 - Moved `LLamaTokenType` enum out into a separate file
 - Made `LLamaSeqId` and `LLamaPos` into `record struct`, convenient to have equality etc

- build run: https://github.com/SciSharp/LLamaSharp/actions/runs/7196891440
 - commit: 9fb13f9584