Use ScopedValues for flags to set

[disberd]

Moved some of the Ref into ScopedValues

The PLOTLY_VERSION ScopedValue can not at the moment be used to change the displayed plotly version for a single plot, as the scope where the value is changed ends before the plot object is sent to the display with show.

This new ScopedValue can instead be used to modify the version used by PlotlyKaleido.savefig to set the plotly version in the kaleido process.
Currently, the savefig with a PlutoPlotly object checks that the kaleido process has the correct version and restarts it with the correct one otherwise

The SKIP_FLOAT32 to control conversion during preprocessing is also now a ScopedValue

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.89%. Comparing base (52aed10) to head (4425a4a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   90.33%   89.89%   -0.44%     
==========================================
  Files          12       12              
  Lines         269      287      +18     
==========================================
+ Hits          243      258      +15     
- Misses         26       29       +3     

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