Port monero-lws to wownero-lws

Adapts monero-lws for Wownero cryptocurrency:

- Rename all monero-lws-* binaries to wownero-lws-*
- Update submodule to point to official Wownero repo
- Use Wownero default ports (RPC: 34568, ZMQ: 34569)
- Update data directory to ~/.wownero/light_wallet_server
- Adapt next_difficulty() calls for Wownero API signature

Key technical changes for Wownero compatibility:

- BulletproofPlus (RCTTypeBulletproofPlus, type 8) commitment verification:
  Wownero stores BP+ commitments in 'divided by 8' form. Must call
  rct::scalarmult8() on outPk commitment before comparing with computed
  commitment (mask*G + amount*H). This is essential for amount decryption.

- Pass rct_type to decode_amount() for proper commitment handling

- Handle Wownero's ZMQ JSON format for ecdhTuple (32-byte mask/amount fields)

No fork of Wownero is required - uses official codeberg.org/wownero/wownero.

tests/test_wire_key.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include "wire/json.h"
+#include "wire/adapted/crypto.h"
+#include "ringct/rctTypes.h"
+
+int main() {
+    std::string json = "\"0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20\"";
+    rct::key key;
+    try {
+        wire::json_reader reader{epee::as_byte_span(json)};
+        wire::read_bytes(reader, key);
+        std::cout << "Parsed key: ";
+        for (int i = 0; i < 32; ++i) printf("%02x", key.bytes[i]);
+        std::cout << std::endl;
+    } catch (const std::exception& e) {
+        std::cerr << "Error: " << e.what() << std::endl;
+    }
+    return 0;
+}