Function fetchManifestEvent

fetchManifestEvent(
    pool: ApplesaucePool,
    tiers: RelayTiers,
    pointer: AppletPointer,
): Promise<NostrEvent>
Fetch the manifest event a pointer names from its relay hints plus the apps tier.

For addresses, the newest event wins, since a named applet is an addressable event that its author replaces on every release.
Parameters
- pool: ApplesaucePool
  The shared applesauce pool.
- tiers: RelayTiers
  Relay tiers; the apps tier is always consulted.
- pointer: AppletPointer
  The decoded pointer.
Returns Promise<NostrEvent>
The manifest event, unverified.
Throws
unavailable:manifest when no relay returned one.
Example
```
const event = await fetchManifestEvent(pool, tiers, decodePointer('naddr1…'));
```