Replace the inherited Grim README with one that reflects what Goblin actually
is: a private, Cash App-style GRIN wallet that pays @usernames via NIP-17
gift-wrapped DMs over Tor, with in-app nostr identity and the goblin.st
identity service. Adds the Goblin banner, a payment-flow diagram, correct
build instructions (binary is `goblin`), and keeps the Claude credit.
- README: credit Claude (Anthropic) for Goblin's development at the bottom,
in place of per-commit co-authorship.
- Onboarding: replace the contradictory "Pay people, not addresses" card with
"Send like a message" and reword the body in plain language (no more
"plumbing"/"ciphertext"). The identity step now says you can rotate your key
anytime to maintain your privacy.
- Home: center the balance hero so it lines up with the Pay amount and the
empty-state below it.