This commit introduces a websocket server via the --daemon argument.

```
./wowlet --daemon 127.0.0.1:1234 --daemon-password "sekrit"
```

The wallet will start in the background and expose a websocket port that you can connect to using a websocket client. This way, you will be able to control the wallet via websockets. The commands are defined in wsserver.cpp, in the `processBinaryMessage()` function.

- `openWallet` - opens a wallet by path/password.
- `closeWallet` - close current wallet.
- `addressList` - Returns a list of receive addresses.
- `sendTransaction` - Creates and sends a transaction.
- `createWallet` - Create a wallet by path/password.
- `transactionHistory` - Returns the complete list of transactions
- `addressBook` - Returns the complete list of address book entries.

Messages sent back and forth between the server and client are JSON. There is a Python example client available over at https://git.wownero.com/wownero/wowlet-ws-client

src/cli.cpp

@@ -1,13 +1,13 @@
 // SPDX-License-Identifier: BSD-3-Clause
 // Copyright (c) 2020-2021, The Monero Project.
 
-#include "cli.h"
-
 // libwalletqt
 #include "libwalletqt/TransactionHistory.h"
 #include "model/AddressBookModel.h"
 #include "model/TransactionHistoryModel.h"
 
+#include "cli.h"
+
 CLI::CLI(AppContext *ctx, QObject *parent) :
         QObject(parent),
         ctx(ctx) {
@@ -22,6 +22,8 @@ void CLI::run() {
         if(!ctx->cmdargs->isSet("wallet-file")) return this->finishedError("--wallet-file argument missing");
         if(!ctx->cmdargs->isSet("password")) return this->finishedError("--password argument missing");
         ctx->onOpenWallet(ctx->cmdargs->value("wallet-file"), ctx->cmdargs->value("password"));
+    } else if(mode == CLIMode::CLIDaemonize) {
+        m_wsServer = new WSServer(ctx, QHostAddress(this->backgroundWebsocketAddress), this->backgroundWebsocketPort, this->backgroundWebsocketPassword, true, this);
     }
 }