Test output in docs using pprint

[MateuszKubuszok]

• [x] cookbook.md
• [x] index.md
• [x] supported-patching.md
• [x] supported-transformations.md
• [x] troubleshooting.md

We are not yet testing .enableMacrosLogging as https://github.com/VirtusLab/scala-cli/pull/2990 hasn't been yet released.

[codecov[bot]]

Codecov Report

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

Project coverage is 87.88%. Comparing base (c6a1256) to head (ab798ee).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #567 +/- ## ======================================= Coverage 87.88% 87.88% ======================================= Files 153 153 Lines 5910 5910 Branches 474 474 ======================================= Hits 5194 5194 Misses 716 716 ```

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