Expose console command execution

[M09Ic]

Background

Menu.RunCommandArgs is the normal public entry point for programmatic execution, but it always goes through the active-menu reset flow. Some integrations prepare a menu command tree themselves and need direct access to the lower-level execution path that StartContext and RunCommandArgs use internally.

Approach

• Add Console.Execute(ctx, menu, args, async) as a small public wrapper around the existing internal execution path.
• Keep the existing execute implementation and current callers unchanged.
• Document that most callers should continue using Menu.RunCommandArgs unless they already prepared a menu.

Tests

• Added a regression test that executes a prepared menu command through Console.Execute.
• Verified the target command runs and the console execution flag is cleared afterwards.
• Ran go test ./...