feat: allow rendering of tables to LaTeX

[rich-iannone]

This feature PR implements the rendering of tables to LaTeX, addressing https://github.com/posit-dev/great-tables/issues/75 and https://github.com/posit-dev/great-tables/issues/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.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.26917% with 29 lines in your changes missing coverage. Please review.

Project coverage is 88.88%. Comparing base (cc9829c) to head (c2f7c81). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
great_tables/_formats.py	92.25%	22 Missing :warning:
great_tables/_utils.py	88.46%	3 Missing :warning:
great_tables/_utils_render_latex.py	99.13%	2 Missing :warning:
great_tables/_gt_data.py	80.00%	1 Missing :warning:
great_tables/_spanners.py	66.66%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #481      +/-   ##
==========================================
+ Coverage   87.86%   88.88%   +1.01%     
==========================================
  Files          42       44       +2     
  Lines        4852     5216     +364     
==========================================
+ Hits         4263     4636     +373     
+ Misses        589      580       -9     

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[rich-iannone]

• Explicitly raise or warn for currently unsupported behaviors (e.g. styles)

Now we warn when there is any definition of tab_style() in LaTeX output.

• formatters sometimes run but their output generate latex errors
  • fmt_nanoplot
  • fmt_markdown
  • fmt_image
  • fmt_url
  • fmt_integer (?) -- this seems to raise a python error

• fmt_integer() is fine. No error on second look
• fmt_url() is not in API.
• fmt_image now provides a warning and formatting is skipped
• fmt_markdown raises a NotImplementedError in LaTeX render
• fmt_nanoplot also raises a NotImplementedError

• the md() and html() functions produce output that causes latex errors (but maybe this is okay?)

• md() still raises a NotImplementedError
• html() will warn and perform LaTeX escaping on the string

[machow]

From pairing, LGTM -- thanks for this ENORMOUS push, excited for latex tables!