Add command line usage support. #14

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (6b5869c) 100.00% compared to head (ca18e71) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #78 +/- ## ========================================== Coverage 100.00% 100.00% ========================================== Files 4 6 +2 Lines 372 494 +122 ========================================== + Hits 372 494 +122 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `100.00% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/fabiocaccamo/python-codicefiscale/pull/78?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo) | Coverage Δ | | |---|---|---| | [codicefiscale/codicefiscale.py](https://codecov.io/gh/fabiocaccamo/python-codicefiscale/pull/78?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo#diff-Y29kaWNlZmlzY2FsZS9jb2RpY2VmaXNjYWxlLnB5) | `100.00% <ø> (ø)` | | | [codicefiscale/cli.py](https://codecov.io/gh/fabiocaccamo/python-codicefiscale/pull/78?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo#diff-Y29kaWNlZmlzY2FsZS9jbGkucHk=) | `100.00% <100.00%> (ø)` | | | [tests/test\_cli.py](https://codecov.io/gh/fabiocaccamo/python-codicefiscale/pull/78?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo#diff-dGVzdHMvdGVzdF9jbGkucHk=) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Fabio+Caccamo)

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