feat(faucet): testnet faucet via taps wallet daemon

.env.example

@@ -22,4 +22,16 @@ NEXT_PUBLIC_HELIUS_API_KEY=
 # Leave empty to fall back to HTTP polling
 ZEBRA_GRPC_URL=127.0.0.1:8230
 
+# Testnet Faucet
+# Talks to taps (https://github.com/zcashme/taps) — an Orchard-only Rust faucet
+# wallet daemon. Hosted at light.zcash.me/taps; cipherscan Express handles
+# Turnstile, then proxies to taps for the spend.
+TAPS_URL=https://light.zcash.me/taps
+TAPS_API_KEY=
+
+# Cloudflare Turnstile (https://dash.cloudflare.com/?to=/:account/turnstile).
+# Set both to enable captcha; leave both empty to disable.
+TURNSTILE_SECRET_KEY=
+NEXT_PUBLIC_TURNSTILE_SITE_KEY=
+
 # Optional: Analytics, etc.