Fork xmrcheckout for Wownero (WOW)

Minimal changes from upstream xmrcheckout to support Wownero:
- Rate provider: Nonlogs WOW-BTC via Kraken BTC/USD
- Subaddress derivation: Wownero network byte overrides (53/63/54)
- Payment URI scheme: wownero:
- Dockerfile: Wownero binaries from Codeberg
- Display text: Monero→Wownero, XMR→WOW throughout UI
- Default daemon: 192.168.88.235:34568
- Added wownero-logo.svg

File and folder structure kept identical to upstream for easy sync.

ui/components/invoice-status-actions.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import Link from "next/link";
+
+export default function InvoiceStatusActions() {
+  return (
+    <div className="flex flex-wrap gap-3">
+      <Link
+        className="inline-flex items-center justify-center rounded-full bg-ink px-5 py-2.5 text-sm font-semibold text-cream shadow-[0_16px_30px_rgba(16,18,23,0.18)] transition hover:-translate-y-0.5"
+        href="/invoice"
+      >
+        Check another invoice
+      </Link>
+    </div>
+  );
+}