Ability to set aliases for sub commands.

[richburdon]

bug

What is the current behavior?

Setting aliases in a command's index file does not propagate to sub-commands.

in ./commands/identity:

export default class Identity extends BaseCommand {
  static override aliases = ['id'];

in the same directory: ./commands/identity/create does not inherit the id alias

export default class Create extends BaseCommand {

Therefore cli id works but cli id create does not.

What is the expected behavior?

It would be convenient to set aliases at the root level.