Function createOutboxRelayPool

createOutboxRelayPool(pool: ApplesaucePool): OutboxRelayPoolLike
The relay pool kehto's createRelayPoolOutboxRouter fans out through.
Parameters
- pool: ApplesaucePool
  The shared applesauce pool.
Returns OutboxRelayPoolLike
A pool with per-relay publish outcomes.
Example
```
const router = createRelayPoolOutboxRouter({ relayPool: createOutboxRelayPool(pool), ... });
```