Rename cli progress bars for release

[shikokuchuo]

Adopts the name .progress_cli with usage like:

m <- mirai_map(1:1000, func)[.progress_cli]

Retains the current (much faster) default [.progress].

This approach has the advantage of not having to check for presence of {cli} on first use.

The slightly clunkier name would not matter for programmatic use e.g. by package authors.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.70%. Comparing base (3aff79d) to head (71def3b).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #143 +/- ## ======================================= Coverage 99.70% 99.70% ======================================= Files 9 9 Lines 667 667 ======================================= Hits 665 665 Misses 2 2 ```

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