Ensure embedded commands are compatible with Simplified Calling Convention

[kevsmith]

Depends on #399

[mpeck]

This feels like a good opportunity to verify that our usage info is at least roughly formatted the same, and that we have a few tests for each command.

Note: This will not include any major functional or content changes. It will merely validate that what exists is formatted reasonably and is tested.

I think the best path is to PR this in batches:

• batch1 - alias, bundle, echo, filter
• batch2 - group, help, max, min, permissions
• batch3 - raw, relay, relay_group, role
• batch4 - rules, seed, sleep, sort
• batch5 - sum, table, unique, wc, which

Batch grouping are subject to change depending on the number of changes. I'll update the issue accordingly.