Refactor console client to new Govor.ConsoleClient project

Removed Govor.Console implementation and introduced a new Govor.ConsoleClient project with a modular command-based architecture. Added dependency injection, command dispatcher, middleware pipeline, logging, and interactive command support. Updated solution and project files to reflect the new structure.

Govor.ConsoleClient/Commands/HelpCommand.cs

@@ -0,0 +1,22 @@
+using Govor.ConsoleClient.Services;
+
+namespace Govor.ConsoleClient.Commands;
+
+public class HelpCommand : ICommand
+{
+    public Task ExecuteAsync(CommandContext context)
+    {
+        Console.WriteLine("Commands:");
+        return Task.CompletedTask;
+    }
+
+    public string LongHelp()
+    {
+        throw new NotImplementedException();
+    }
+
+    public string ShortHelp()
+    {
+        throw new NotImplementedException();
+    }
+}