Function createRelayPoolHooks

createRelayPoolHooks(pool: ApplesaucePool, tiers: RelayTiers): RelayPoolHooks
Build kehto's RelayPoolHooks over the shared applesauce pool.

Scoped relays (one relay per window, the NIP-29 pattern) are kept minimal: one open subscription per window, replaced on reopen, and events delivered to the window's bound port as relay.event envelopes.
Parameters
- pool: ApplesaucePool
  The shared applesauce pool.
- tiers: RelayTiers
  Relay tiers used for selectRelayTier.
Returns RelayPoolHooks
Hooks for ShellAdapter.relayPool.
Example
```
const adapter: ShellAdapter = { relayPool: createRelayPoolHooks(pool, tiers), ... };
```