chore: stub out remove command

src/AltGen.Console/Config/RemoveConfigCommand.cs

@@ -0,0 +1,16 @@
+namespace AltGen.Console.Config;
+
+sealed class RemoveConfigCommand() : AsyncCommand<RemoveConfigCommand.Settings>
+{
+  public class Settings : CommandSettings
+  {
+    [CommandArgument(1, "<provider>")]
+    [Description("The provider to remove.")]
+    public string Provider { get; init; } = string.Empty;
+  }
+
+  public override async Task<int> ExecuteAsync(CommandContext context, Settings settings)
+  {
+    return 0;
+  }
+}