Document how to use `to_html_datatable` in a Streamlit application

[github-actions[bot]]

Thank you for making this pull request.

Did you know? You can try it on Binder: .

Also, the version of ITables developed in this PR can be installed with pip:

pip install git+https://github.com/mwouts/itables.git@update_streamlit_doc

(this requires nodejs, see more at Developing ITables)

[codecov-commenter]

Codecov Report

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

Project coverage is 95.88%. Comparing base (7c4f89c) to head (e019e91). Report is 6 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #316 +/- ## ========================================== - Coverage 96.21% 95.88% -0.33% ========================================== Files 27 27 Lines 1189 1191 +2 ========================================== - Hits 1144 1142 -2 - Misses 45 49 +4 ```

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