chore: merge CommandArgType into CommandArgSpec

src/Features/Console/Application/Commands/ClearCommand.cs

@@ -7,7 +7,7 @@ public sealed class ClearCommand : ICommand
 {
     public string Name => "clear";
     public string Description => "Clears the console output.";
-    public IReadOnlyList<CommandArgSpec> Args { get; } = new CommandArgsBuilder().Build();
+    public IReadOnlyList<CommandArgSpec> Args { get; } = [];
 
     public CommandResult Execute(CommandArgValues args) => CommandResult.Ok(clearOutput: true);
 }

src/Features/Console/Application/Commands/HelpCommand.cs

@@ -9,7 +9,7 @@ public sealed class HelpCommand(ICommandRegistry registry) : ICommand
 {
     public string Name => "help";
     public string Description => "Lists all available commands.";
-    public IReadOnlyList<CommandArgSpec> Args { get; } = new CommandArgsBuilder().Build();
+    public IReadOnlyList<CommandArgSpec> Args { get; } = [];
 
     private static string FormatUsage(ICommand command)
     {