add typed guest pointer template
add X_KSPINLOCK, rework spinlock functions.
rework irql related code, use irql on pcr instead of on XThread
add guest linked list helper functions
renamed ProcessInfoBlock to X_KPROCESS
assigned names to many kernel structure fields
- Mainly use `assert`s, since failure is very rare
- Forward failure of `CreateSemaphore` to guests because it is more easy
to trigger with invalid initial parameters.
