Improve correlation heatmap

[mpetrosian]

Improve visualization of correlation heatmaps

• [x] Remove visualize_measurement_correlations.
• [x] Separate plotting and data preparation functions.
• [x] Add two public functions that get correlation data frame for:
  • [x] Measurements.
  • [x] Factor scores.
• [x] Add a plotting function that plots correlation data given heatmap and figure layout relevant arguments.

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@8b5236d). Click here to learn what that means. The diff coverage is n/a.

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  Coverage        ?   91.48%           
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  Files           ?       36           
  Lines           ?     2747           
  Branches        ?        0           
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  Hits            ?     2513           
  Misses          ?      234           
  Partials        ?        0           

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