Fix error from incorrectly passing nanoplot options to args in _generate_nanoplot()

[rich-iannone]

In a previous PR, a call to _generate_nanoplot() was simplified to use ** to pass through args:

great-tables/great_tables/_formats.py

Line 3832 in cd618a4

**options_plots,

However, the argument names in three cases don't match. These are:

• line_type != data_line_type
• show_ref_line != show_reference_line
• show_ref_area != show_reference_area

The solution here is to expand the shorter arg names to their longer counterparts. This doesn't break the GT API since the longer names are what the user has access to within nanoplot_options().

With this change, examples in https://posit-dev.github.io/great-tables/blog/introduction-0.4.0/ should no longer be broken.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 82.35294% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 75.26%. Comparing base (cd618a4) to head (ff69cb5).

Files	Patch %	Lines
great_tables/_utils_nanoplots.py	82.35%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #258   +/-   ##
=======================================
  Coverage   75.26%   75.26%           
=======================================
  Files          41       41           
  Lines        4180     4180           
=======================================
  Hits         3146     3146           
  Misses       1034     1034           

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[machow]

Shoot--thanks for fixing, and sorry for sacking all nanoplots with my clean up 😓. I'll merge now, since it's easy to confirm in the generated docs it's working, but let's be sure to add some basic fmt_nanoplot tests that, so the tests flag these situations