Use raw string for ASCII art in CLI entrypoint

[lochhh]

Description

What is this PR

• [ ] Bug fix
• [ ] Addition of a new feature
• [x] Other

Why is this PR needed? This PR closes #211

Checklist:

• [x] The code has been tested locally
• [ ] Tests have been added to cover all new functionality
• [ ] The documentation has been updated to reflect any changes
• [x] The code has been formatted with pre-commit

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 99.68%. Comparing base (a1c91e6) to head (e89ab26).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #212 +/- ## ======================================= Coverage 99.68% 99.68% ======================================= Files 11 11 Lines 639 639 ======================================= Hits 637 637 Misses 2 2 ```

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