Add render target for html pages

[isabelizimm]

Summary

Thank you for contributing to great_tables... this is great! To make this process easier for everyone, please explain the context and purpose of your contribution. Also, list the changes made to the existing code or documentation.

Related GitHub Issues and PRs

• Ref: extending functionality originally planned in https://github.com/posit-dev/great-tables/issues/228

Checklist

• [X] I understand and agree to the Code of Conduct.
• [X] I have followed the Style Guide for Python Code as best as possible for the submitted code.
• [X] I have added pytest unit tests for any new functionality.

[codecov[bot]]

Codecov Report

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

Project coverage is 86.80%. Comparing base (7f65def) to head (3bd3a35).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #377 +/- ## ========================================== + Coverage 86.77% 86.80% +0.02% ========================================== Files 42 42 Lines 4546 4548 +2 ========================================== + Hits 3945 3948 +3 + Misses 601 600 -1 ```

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