Parse cli arguments and use them as UCI commands (#370)

Parse cli arguments and feed them to the engine as if they were uci commands.
This allows to easily do:

```bash
dotnet run -c Release "position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1" "perft 5"

dotnet run -c Release "position startpos" "go depth 6"

./Lynx.Cli.exe bench

# etc.
```

There's a catch: you can't pass "exit" to terminate the execution at the end since `LynxDriver` reads the commands asynchronously in case a `stop` (or 'quit') are requested by GUIs, so that would happen immediately.
So can't really create an action with this

src/Lynx.Cli/Listener.cs

@@ -14,10 +14,15 @@ public Listener(Channel<string> guiInputReader)
         _logger = LogManager.GetCurrentClassLogger();
     }
 
-    public async Task Run(CancellationToken cancellationToken)
+    public async Task Run(CancellationToken cancellationToken, params string[] args)
     {
         try
         {
+            foreach (var arg in args)
+            {
+                await _guiInputReader.Writer.WriteAsync(arg, cancellationToken);
+            }
+
             while (!cancellationToken.IsCancellationRequested)
             {
                 var input = Console.ReadLine();

src/Lynx.Cli/Program.cs

@@ -45,17 +45,13 @@
 {
     new Writer(engineChannel).Run(cancellationToken),
     new LynxDriver(uciChannel, engineChannel, new Engine(engineChannel)).Run(cancellationToken),
-    new Listener(uciChannel).Run(cancellationToken),
+    new Listener(uciChannel).Run(cancellationToken, args),
     uciChannel.Reader.Completion,
     engineChannel.Reader.Completion
 };
 
 try
 {
-    if (args.Length > 0 && args[0] == "bench")
-    {
-        await uciChannel.Writer.WriteAsync("bench");
-    }
     await Task.WhenAny(tasks);
 }
 catch (AggregateException ae)