Request: Add CLI Completion

[willwill2will54]

This issue is requesting an enhancement to Perseus. Details of the scope will be available in issue labels.
The user described the problem related to this request as follows:

Perseus-cli is missing CLI Completion

The user described the issue as follows:

I would like to request the adding of CLI completion definitions for the perseus-cli tool. Perseus-cli uses clap under the hood, which has functionality for generating completions at run-time or compile-time. Which to do would require discussion, as each has trade-offs.

• The author is willing to attempt an implementation: true

Tribble internal data

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[arctic-hen7]

Yes I've been meaning to do this for a while but just haven't gotten around to it! I think compile-time completions sound good unless you see any particular problem with that? I'd be very happy to accept a PR for this.