Enrich the Zapstore listing with the 512x512 launcher icon and the full
supported_nips list (synced with the README checklist). Relays are not a
zapstore.yaml field — zsp reads RELAY_URLS (default wss://relay.zapstore.dev) —
so document how to publish to additional relays in the yaml and RELEASE_OPS.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VK27apdHs4Yzxa54qx44oJ