Hide table inner lines

[leqo-c]

Overview: What does this pull request change?

Add option to hide table inner lines.

Motivation and Explanation: Why and how do your changes improve the library?

This PR adds the possibility to hide inner rows of a table by specifying the new keyword "include_inner_lines=False".

Links to added or changed documentation pages

https://manimce--4731.org.readthedocs.build/en/4731/

Further Information and Comments

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[leqo-c]

Hi @reviewers, some tests are failing that are unrelated to my PR (tests/test_graphical_units/test_tables.py).
I added some tests in a different file (tests/module/mobject/test_table.py) and those do not appear among the failed ones.

I apologize if this sounds unreasonable but, could you help me figure out how to make those tests pass and let the PR go through? Thanks

EDIT: Solved, was a dumb indentation error (fixed with another commit).