ux: improve `azd down` to show individual resource deletions and timings

[weikanglim]

Let's improve on the UX for azd down.

A suggestion is that we take the format of what we have for azd provision:

And apply it to azd down:

Concretely this means:

1. The resource(s) printed out should be the same list
2. The format of output should be similar
3. The individual resource timings of each deletion should be available

[weikanglim]

I think we'd also want to track "delete" vs "purge" (hard-delete if there's a soft-delete option for a resource) separately

[ellismg]

Does ARM expose this information to use today (via some nested operation thing like we have during provision) or are we going to have to continuously poll the resource groups to try to observe deletions?

For purge since they are classic LROs I can see how we can get timing information on a granular level, but I'm less certain we can get per resource delete information while deleting the resource group itself.