chore: replace drain with poll for queue for GameThread

[pollend]

This removes an extra array allocation when we process the processing the pending runnable

[DarkWeird]

this happens only one time per tick.
it's not scary

what about adding process during iteration ( multi-thread behavior, like process adds another processes)?

[pollend]

lot of this logic is bound to the main game thread @DarkWeird :?

[DarkWeird]

lot of this logic is bound to the main game thread @DarkWeird :?

It should be bound to main game thread. Otherwise you can not use gamethread class :)

I afraid this things:

1. Concurrent modification(don't should be - concurrent queue)
2. Infinity loop (process adding recursion)