feat: allow rendering of tables to LaTeX

[rich-iannone]

This feature PR implements the rendering of tables to LaTeX, addressing #75 and #178. This will be exposed through the as_latex() method on the GT class. If in Quarto and the render target is LaTeX, tables will be automatically rendered as LaTeX tables.

Preview: https://pr-481--gt-python.netlify.app/a-latex_examples/index.pdf.

[codecov]

Codecov Report

Attention: Patch coverage is 51.84382% with 222 lines in your changes missing coverage. Please review.

Project coverage is 84.60%. Comparing base (cc9829c) to head (8385bd9).

Files with missing lines	Patch %	Lines
great_tables/_utils_render_latex.py	35.74%	178 Missing ⚠️
great_tables/gt.py	15.38%	22 Missing ⚠️
great_tables/_formats.py	87.24%	19 Missing ⚠️
great_tables/_export.py	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #481      +/-   ##
==========================================
- Coverage   87.86%   84.60%   -3.26%     
==========================================
  Files          42       44       +2     
  Lines        4852     5185     +333     
==========================================
+ Hits         4263     4387     +124     
- Misses        589      798     +209     

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[machow]

Can you move these out of gt.py along with the definition _render_as_latex()?

But as it exists, this code is...

• importing as_latex, which...
• calls _render_as_latex(), that is defined in this file, which...
• calls the create_*() functions defined in _utils_render_latex

So the path is going...

• _export.as_latex() -> gt.py -> _utils_render_latex()

Ideally it seems like it should just be going...

• _export.as_latex() -> _utils_render_latex()

And then we just assign the function to GT.as_latex()