Load the cli module lazily for spacy.info

[danieldk]

Description

This avoids that the spacy module cannot be imported when the users chooses not to install typer/requests.

Proposed alternative to #12952. With lazy loading, people that do have typer/requests installed will not pay the loading penalty when they just import import spacy.

Types of change

Enhancement

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[Vuizur]

I think lazy importing in general is a good solution, I used https://github.com/orsinium-labs/benchmark-imports and importing the CLI and requests apparently takes quite a while:

1.1127 root       spacy
0.4362 project    spacy.errors
0.4353 project    spacy.compat
0.4066 project    spacy.cli
0.3396 dependency thinc
0.2671 project    spacy.pipeline
0.2066 project    spacy.cli.download
0.2055 dependency requests
0.2004 transitive thinc.config                             from thinc
0.1934 project    spacy.pipeline.attributeruler
0.1479 transitive confection                               from thinc.config
0.1360 transitive numpy                                    from thinc
0.1310 project    spacy.language
0.0842 transitive urllib3                                  from requests
0.0736 transitive requests.exceptions                      from requests
0.0734 dependency thinc.api
0.0729 transitive requests.compat                          from requests.exceptions
0.0656 transitive pydantic                                 from confection
0.0646 project    spacy.pipe_analysis
0.0644 transitive charset_normalizer                       from requests.compat
0.0637 project    spacy.tokens
0.0629 project    spacy.tokens._serialize
0.0578 project    spacy.util
0.0499 project    spacy.cli.debug_diff
0.0495 transitive charset_normalizer.api                   from charset_normalizer

[adrianeboyd]

I had actually never noticed spacy.info in the API and it looks like this isn't tested anywhere. I think it would make sense to add a very quick test that it runs without errors, maybe in test_cli_info? This isn't 100% optimal (I might have chosen test_misc otherwise), but it would be nice to test it with args without creating another tmpdir?