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.

src/lws_version.h.in

@@ -1,4 +1,5 @@
 // Copyright (c) 2025, The Monero Project
+// Copyright (c) 2024-2025, The Wownero Project
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without modification, are
@@ -34,7 +35,7 @@ namespace lws { namespace version
   constexpr const char commit[] = "@MLWS_COMMIT_HASH@";
   constexpr const char date[] = "@MLWS_COMMIT_DATE@";
   constexpr const char id[] = "1.0-alpha";
-  constexpr const char name[] = "monero-lws";
+  constexpr const char name[] = "wownero-lws";
 
   // openmonero is currently on 1.6 and we have multiple additions since then
   namespace api