Docs: add copy buttons

[codecov[bot]]

Codecov Report

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

Project coverage is 55.28%. Comparing base (ab6a54e) to head (7988dcd). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #200 +/- ## ======================================= Coverage 55.28% 55.28% ======================================= Files 78 78 Lines 2458 2458 ======================================= Hits 1359 1359 Misses 1000 1000 Partials 99 99 ```

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