Adds components/SupportSkateSpots — two honest paths to send sats to the
project, reusing existing rails (no new deps, no backend):
- Zap SkateSpots: NIP-57 zap to the platform pubkey (public + optional comment,
needs a signer).
- Pay quietly: plain LNURL invoice from the platform lightning address
(anonymous, works logged out).
Payment runs NWC -> WebLN -> QR fallback, exactly like the Pro flow. Copy is
explicit that this is support, not a purchase (buys nothing, no refunds), and
that merch/Pro are separate.
